The clearances and traffic paths are all very small. VERY small. The dining table appears to be the entire focus of the home, yet it is going to be difficult to walk through or past because of the too small clearances. The garage also appears small. For the amount of external wall space, there doesn't appear to be very many windows to take advantage of all of that wall space.

Where do you plan to prep in the kitchen? I don't see a water source in the kitchen, only in the scullery. And that is an odd location for a butler's pantry/scullery. It's usual location is between the dining area and kitchen.

There are a lot of very non functional choices here that appear to have been made for the sake of visual interest or for being different, but that will be awkward to live with in real life. I suggest you take a look at some of the available home plans on the net. Not because most are so great, but most at least do have a bit more logical flow to how the rooms relate to each other. That's missing from this plan, as well as a good sense of how this is all going to be engineered.

The living room has almost no outdoor view. Ditto the dining room. This may be an advantage in your climate, but I find it a little claustrophobic.

The "hall" bathroom opens off the dining area. Since this is probably the bath guests will use, it could make for awkward dinner parties. Would it be better to do away with that little exterior area between bedroom 3 and the guest room bath and slide everything down to work out more privacy for that hall bath?

The exterior space between the TV area and the master bath also makes for a very small TV area. It allows for windows in the master bath, but you could add skylights instead.

Is anything going to be able to grow in the "island" between the kitchen and the garage? Plants there will get almost no light, It's not large enough to sit in. This area might be better used as living space.

There are no windows toward the back garden ... is there a reason for this?

Please keep us posted, I'd love to know more about building in South Africa!

I'm not sure how much help we can provide. A plan like it would never be built here in the USA. Is this a common design for your area? Or are you trying to be different and trying out some funky stuff?

Is that the full extent of your lot, with the setbacks shown?

Your first plan has some nice, distinctive architectural features I really like. What strikes me, though, and might be a problem for me is what an introverted home it is. Is that specifically what you want? Because it would be the defining characteristic of the home.

The second version is not only far more oriented to the outside but would probably feel significantly more spacious because of the way the eye can just keep traveling without running into a wall. The diagonal view on out the playroom windows is an especially long line.

If a lovely Mediterranean climate, where outside is often as comfortable as in, then it would seem to make good sense to develop as strong a relationship as possible between the two to allow living to spill right on outside. And, of course, be able to leave windows and doors open to the breezes. ?