Too cute. Hey, she's preggo. I love them.

What a cool house design! Off the top of my head, I think I'd be inclined to paint the brick surrounding the sliding door (1st image) and either paint the pillars or clad them in same timber as the ceiling just inside that same sliding door (1st image). I'd be tempted to leave the large wall as bigreader suggested simply because it's such a magnificent feature. If you live with it for a while then still not loving it, then paint it. While I like the chandelier, it doesn't really suit where it is, as Warren pointed out. If you wanted to change, best to consider if there are any other electrical changes you want to make and get an electrician out only the once. As far as paint colour goes, do you know what the current wall paint colour is?I'd paint to match the wall colour and complement the carpet, but important to know if you like the current colour or want to change. Also it would help to know what your own plans for the interior style is. Do you want to remain true to the 80s with just a few tweaks, or change it completely? About the balustrade, do you want to change the colour of it as well? Is it also made out of glass (couldn't quite tell from photo)?

Hi, we had the charcoal next gen decking installed 6 months ago for similar reasons - fully exposed deck, no time to maintain. Went with charcoal after much debate as we didn’t want it to look like fake wood but rather something different and modern. We’re happy with the outcome

The flooring is such a big component of a space you really need to consider it as part of the whole look you’re aiming for. I would say that generally for practically the carpet would be darker than the walls.