My spatial sense is struggling today so I'm trying to work out the block in the scale of it's surroundings - laneway, parklands etc
Sounds like plenty of variation then if you have that mix of materials.
I know on your mockups it's representative but like Thatbum says consider sexing it up more.
- tiled feature wall
- more colour variation
- different types of Scyon for contrast
- stone cladding