That's what my husband says too. Thanks:)

i prefer the new roof at right angles to the house but if you don't want a leak between the new roof and the house you need to consult with the installers because there may be an additional cost

Shifting the laundry will create a larger laundry and allow for a 'kids bedroom zone' with better access to bathroom for all 3 minor bedrooms. Place the rumpus where dinning is. This can be separated or use the great sliding wall/door idea. It also allows view from kitchen. I agree with moving the fridge and creating a more open WIP. This also allows for a WI Linen - which could be opened up to the mud room, or even a powder room. I found the front living room to be an awkward size and shape so did a slight rearrange in that area. This gives the Living Room access to the north facing patio/outdoor area, tying all the living spaces together while keeping them seperate.

It's not just about orientation but also size and type of opening and it's positioning in the room. I have 2 west facing bedrooms that never heat up at all because of the size of the windows and the fact they have window hoods on them. Sunlight hits those rooms only around 6pm for about 1hr. What you need is for someone to draw up a sun map for your house so you can see the path of the sun during the hottest months of the year. Even if the sun comes directly into that sliding door during the heat of the day there are still things you can do about it. Given that it adjoin an alfresco area with I presume a solid roof the orientation of your prevailing winds is going to be a bigger factor on the comfort of the room.