Congratulations, really good bones, lots of nice natural light. I was a bit unsure if you were about to do kitchen laundry. The current kitchen looks neat and tidy but here are a few thoughts if that is what you are about to do. I love bamboo floors. Would be good to see what they look like. Some thoughts Structurally are you able to take out the two kitchen walls that enclose the kitchen from the living dining. Leave the entrance wall in creating an open plan living dining with either a peninsula or an island bench with breakfast bar. Keep that area closed from rest of the house as is now to save on your heating cooling costs. Can you locate the laundry into the current mud room and perhaps expand that room - though functionally it is a long way from the rest of house. It may pay to get a building designer to help you. The fee would be worth it. Especially if changing structural features like walls. Court yard - are you able to put a roof over it then you would be able to walk to games room under cover depending how much access you would like to that room and how frequently you would use it. However you would behave box gutters and they would need to be able to take high volumes of rain Good luck and keep us posted with updates.

Not really adding anything new here, but I would consider painting the recess behind the fridge dark, and pendant lights over the island, but not not necessarily dark pendants, something lighter to tie with the rest of the room, brighten it up a bit and define it more as its own space. A large fruit bowl (white?), plant, vase etc on the benchtop will make a huge difference on its own as someone suggested. I would play with that a little first to see what difference it makes before making big changes. Lighter stools could also make a big difference. Put a bit of fabric/clothing etc you have around over the seat pads and see how it would look with new colours to lighten them up too. Your room seems really close to being fabulous.

Also love how you have reduced the plinth, I did that with our wall of pantry cupboards so that they wouldn't be too tall and difficult to reach things on the top shelves cheers

In Victoria our planning scheme has min dimensions for rooms in apartments and for garages. Single garage 3.5x6m. Bedroom 3x3,6m includes space for robes. Aim for 2 living spaces or a bedroom that can be second living space in a large house. The current trend for open plan kitchen dining family has everyone in one space which can be noisy and intrusive if no other space available. Toilets. Large family house needs 2 toilets all can use. Burying one away on ensuite results in need for a third Do a furniture plan for dining a family including storage. I find drawing up all items to scale cutting them out an placing on plan the easiest way to look at options. Include your fireplace as a cut out. You need to be able to accommodate everyone. Tv? I suggest talking directly to an architect to refine your plan. A house is a major investment so cost of architect justified. Also look at volume builders plans on internet and go see their display homes