You may have already made a decision on this but I thought I'd just weigh in with my thoughts anyway ... six months ago we finished fitting out a new kitchen and we are thrilled with both the look and the practicality of it all. Initially I was going to go down the glass splash back track but eventually I chose tiles because I decided that, for me, the seamless splash back was a bit bland and same same. I also love blue, brown and white as a palette – and the tiles I chose were just slightly wonky (not too crazy – they still had to be easy to wipe over etc), rectangular, hand-made Spanish tiles in a lovely duck-egg blue. The slight wonkiness means they catch the light beautifully as you move around the room. The benches and cupboards are a warm white and the large island bench is a fantastic slab of spotted gum with another long piece of spotted gum on the upstand behind the sink. Behind the stove (which is the only place that the real concern about grotty grout really comes into play) we have a stainless steel splash back going up to the rangehood. Not sure if this helps but I am thrilled with my kitchen and have no regrets about going with interesting tiles.

If it was my choice I'd go with the green option to avoid a room that is all shades of orange. Also, chrome or timber. Although chrome does remind me a bit of the 1980s.

It looks like quite a big opening. The direction the door is sliding looks correct to me; however it looks like its drawn as a 3 panel slider with incorrect sized door leafs for an opening of that size. Might just be my eyes, but worth double checking so you get a good appreciation for the opening

I have just had another look at your floor plan and hopefully give you a better family room and flow, using the 4th bedroom is just too small unless you were to spend the money to make it the same width as the family room would be a mistake. . I know you mentioned through breeze, you should get that with the current window next to the 4th bedroom and by using the sliding door that is already installed in what was bedroom 2 this would also add breeze and light and importantly give you an overall larger spacious family room. The large 3 m x 900 island would have the sink which is one of two positioned slightly to the left so as not to be seen when viewing from the front of the house. The kitchen continues across into the old dining which allows for a servery to the alfresco and a wall of pantries on the back wall. The new dining table space allows for a long side board, IT, Kids craft with access to outside and importantly again you are able to supervise them while working in the kitchen or sitting on a lounge. The living room could be divided into two spaces if and when needed by using folding stacking doors, and again I think it's important to be able to keep that room as whole overall and not turn into two small rooms. Without seeing the size and shape of the block and how the house is positioned it's difficult to suggest anything else. cheers