I like the idea of turning the toilet as well. Can you make the entry door a pocket slider? Have you considered a slatted timber divider (fitted not free standing) as a screen it would provide partial privacy without closing in the area and it would look lovely if you turn the loo and have a pocket entry door. It would be where the current door opens on your plan. I'd also put the shower on the opposite wall, the vanity end, and have glass a metre from wall/vanity end and open for the rest. I had that in my last ensuite and it works a treat, a walk in shower not needing a door which tends to close in the area. Shower water didn't splash out, a metre is all that's needed and it looks great. Don't forget to have the shower floor slanted towards a shower width drain under the shower though or water on the floor will go everywhere.

Thanks for the opportunity to look at your room and think about what I would do. It has been fun. I think the round coffee table will work if it is large enough for everyone seated in the L sofa arrangement to reach it. (Bonus is no barked shins from sharp corners on a square one.) I agree pale colours like yellow won't do much for bringing about a changed more modern look. The room needs more drama and freshness and I think that currently the room has too many colours in the pale range and not enough contrast. I would go for introducing more of the stronger colours in your attractive tribal fabric, including black and white. Black in particular will allow you to really update the look. Consider painting the bookcase or even the doors black. (The existing coffee table would even look good painted glossy black.) Some plump cushions in the tribal fabric and others in a bigger more graphic design in large red and white zigzags or stripes say, would add to a more integrated look. Your bright yellow pot plant holder on the bookcase is another colour in your tribal fabric which would look good in the scheme as a minor accent, say, more pots that colour in a larger size, a big vase/artwork or lampshade. My advice is to stay away from golds and beiges as they relate to older fashions. A large framed in black graphic print on the wall in black and white (or even photo with meaning to you) could be an idea to think about too.

Sorry but I would sack the draftsman. He/shes no architect. That roof is a nightmare. I try and think about the function of each room and how you would live in it. The entrance is like a cricket pitch but no where to put the bat and ball when you are finished. You come in from the garage or entry door and you are in the middle of nowhere.. Where you going to put you shoes and jacket. And if you want to use the toilet or wash your hands went you get home you have a 20m trek through the house.?? Don't like the bedroom 1 right at the front door and the doors are all hung wrong. You are going to be walking around them all day. The ensuite is badly sized. Shower to narrow, toilet too long and no basin. You going to be opening that door with dirty hands. Think about the floor space to dry your self and dress/undress. Cavity sliders are a pain. Like you have to open them almost all the way to get through where an opening door you glide through. With cavities also you mostly have to walk into the corner of a room to get in and out (study and rumpus) where as a normal door it 1/2 a step less. Master bedroom walk-in wardrobe is dumb. Draw it on the ground, work out how your clothes will hang, and see how much room you have left. Same for the bedroom 3 and 4 wardrobes..Dumb. What were you thinking with that pantry.. It like 8 steps in then 8 out again. Pantry should be more square, have a butlers sink in it. Be the food prep area, pots dishes etc out of sight especially in an open plan place. Be light and the food perpetration area be close enough to the door so you can converse with the guests or family other wise you might as well have a maid who is not seen or heard. Bed 3 and 4 are miles away from a bathroom. The toilet is probably OK in size, just needs a bigger door. 720 you are going sideways through it. Bed 2 backs onto the shower and toilet. Which room are you going to put your little kid in. Long way from mum and dad.

Judging by the plan, the photos and your comments it appears that too much heat is coming in from high light glazing (clerestory windows) into the lounge and dining areas. Both rooms will be cold in winter because the direct heat from these windows is not enough and not absorbed in an thermal mass and they do not have ground level windows or glazed doors facing north. The elevated floor means that it is cold under the house so heating in winter goes down as well as up. The roof would lack adequate insulation due to the period in which the house was built. The roof tiles probably have another 15 years maybe a bit more so it is costly to insulate from the top (i.e. taking roof tiles off adding insulation then putting roof tiles back in again. The colour of them is contributing a lot to the heat. So what to do. - add external shading device to the highlight glazing, maybe timber battens 40 x 40 at 20mm spacings. This will block direct sunlight within the shading season. That helps to reduce heat intact and see how you go. If that does not work then - add a rigid foam core board to the underside of the timber ceiling, e.g. Foilboard which is 20mm thick r 2, then install a 12mm plywood ceiling lining under this. That way you retain the timber rafter ceilings but also one that has a light coloured (hoop pine ply) timber in between. (Note this is costly) - big gains in heat loss is achieved with underfloor insulation. Try r3 bulk squeezed tightly between the floor joists. Then you can plan for the future with the following - change glass in windows and glazed doors to a low e glass - install insulation into the cavity of the external walls using a company called envirowall. - replace roof tiles with a light coloured metal roof, replace the existing roof battens with a 100 x 40 batten so that you can install a 100mm thick anticon insulation. All of the above costs money and if you don't do it then it costs money to burn energy to keep the living rooms between 21 to 27 degrees year round (what we consider comfortable) so if it tough to decide what to do or not. As an alternative For about 40k you could spend 30 of it on solar cells, and an awesome battery (Tesla powerwall 2) and buy some wall mounted ac units. But that would be kicking the can down the road. But sometimes you have no choice. Good luck