The bricks are a nice idea but probably not suited to the slate. I would possibly add a pendant light or 2....maybe wire caged over your dining and a white bookshelf to the wall of the kitchen. Does it currently have a blackboard on it? Anyway I would add a white bookshelf and add stacks of bowls and cookbooks and some decorative personalised elements. This will add some depth and a refined industrial feel but not be too heavy in relation to your slate.

Can you take out one of the garden beds (front left) and do a smaller deck area to transition from the upper deck down to the paving. I think you need a much lighter colour to provide light and contrast with all the tropical plants. Agree yellow and orange are not helping create a relaxing outdoor area. You already have warm colours in the terracotta tile around the pool so a colour for the walls that cools them down, look for neutral tones in lighter blue/greys to reflect the pool. You can see the difference in the photo above which looks much lighter than in your photo with the dark brick and terracotta orange on the walls which just seems to suck the light out. Large pots can be in your favourite pops of colour to great interest and contrast. Good luck with your project.

The covering of the sofa is less important than the style - go for one that is long enough to lie down on, not too puffy and not a corner suite. The key thing with your dining furniture is to have the same colour legs on your sofa - there is often choice of stain or most places can arrange this for you sometimes oiling it yourself is an option. I have found sourcing nice dining furniture can be more challenging than couches so I would do that first- remember you don't have to match the table with chairs you can mix and match which is usually more interesting. A relatively neutral couch is a good idea but think about durability - personally i am not a fan of black couches unless they are light in frame- they can really dominate your room. If you want lighter style of furniture try places that do retro - mid century as they seem to be smaller and lighter in appearance. Bring in some texture and colour with cushions a clock, a throw rug and art work - but don't rush - take your time finding the right thing. all the best

Should be under products.