the only things and they are small, the red plant likely should have been removed and then the left front could have had the Ech Tennellus hacked back to match the Riccia area like on the other side.
Basically keeping the groups a bit more separated. Still, this would be in the top 50 to 20 about 5-7 years ago.
Beatifull scape. I like to do my hardscape too and think about plants later.
Unfortunately for me it has led to some stunning rockscapes that are not matched by plant choice and growth.
But yours is awesome.