This project will be very nice!
In the pics of your last post I can see that the water is not very deep or especially in the first image it's flowing quite slow. In that case it's ok that the stones keep dry.
In your renders I have the feeling of fast flowing and a bit deeper water, what is the reason that I was prefering the image with the more wet stones.
(I even would think it could be nice to have small drops falling into the grass and over the stone group in the middle)
Very curious, where this goes