Two things I’ll do in the future is move the left trunk further to the right as it’s a bit too balanced where it is. Also I’ll add a clump of broadleaf evergreen, probably a small-leafed azalea, to the back left. It looks a bit sterile as is.

I have the tree on a wooden board, which will be temporary support for about two years. After that time, I hope the roots will be solid enough (with some interior bamboo shafts) to support the entire kokedama and be able to be placed directly on a bench—sans pot or slab. 

Best,

Michael