i think it looks great. I think it looks very natural and the way you have the waterfalls planned, it will look spectacular. Once you get it planted with submerged plants below the water ( I see all the pockets for them) and plants and moss above as well as maybe adding a large piece of driftwood the goes both above and below the waterline, the rockwork will be in the background at that point.
It's like the canvas of a painting - it's very important, it's the base of the art, it gives a lot of texture but it will be covered by the "true stars" of the "painting" when it's finished.
Eager to see how this continues to progress