I'm no expert my any means. But you asked so here it is...
I LOVE it!! The right side to me is BOSS!! Leave it!! The left side looks to uniformed if that makes sense. Maybe stand the back stone up to fine it height and make the other stones different heights?
A few on the right look all the same level. I also like the idea of the one rouge stone. They have a name for that. If you already knew this I apologize for posting then
Suteishi (a sacrificial stone)
The Suteishi is a small stone that does not stand out in its own right, and may even become hidden by plants over time. The Suteishi can be omitted from the aquascape if you are creating a Sanzon Iwagumi, which has a more striking presence. The Suteishi adds an element of subtlety, intricacy and complexity to the Iwagumi.
Also a lot aqua scaping is just go with it. No plan. Here's a good video I love to watch.
'Through the Eyes of a Child' Aquascape by James Findley - The Making of - YouTube
I just wanna be clear on one thing though. We all have out opinions and they all differ. I'm not a professional at all, I respect you and your hard work. I just offered what I saw and mean no disrespect at all. Your hard work had definitely paid off and it shows no matter what!! Remember your the one that looks at it not us!! I've gotten torn apart on another forum a out my cichlid tank and I went off and got kicked off(don't care)
This forum is 300x's better and the members here are much more helpful and polite. I don't criticism but not being attacked like I was. I guess my point is... Your happy then that's all that matters.