Looks good! It will probably go through tons of revisions if you are like me and keep getting new ideas and inspiration. You will probably move the stems in the back more and the hardscape forward in time. I also have a wood piece but i learned quickly that as my plants grew, they covered the wood and i argued, whats the point of this wood if you cant even see it?
I think the moss on the wood would look nice. I don't know where to get that though and what kind