A combination of nooks and crannies plus some open space, arranged in a way that you find visually appealing and makes your life easier for maintenance is the best rockscape.
With what you have in the photo, it seems visually appealing to me and provides both open spaces and nooks and crannies. Thus, I say it looks like a win.
One caveat is the ability to maintain the tank, as in cleaning glass, etc. With that in mind, what is on the left-hand side and in the foreground may make it difficult to slide a glass cleaning magnet through between the glass and the rock, or even make it difficult to get a long-handled scraper in there. That could make for frustration down the road when working on tank maintenance.