Nice scores.
AFAIK acro crabs nearly always have that raccoon/bandit look to them. I once got a colony that had an "acro crab" that was more of a "gorilla crab" (think that was the actual common name, not sure now). Thing got huge before I was able to catch it (only took a few weeks to go from teeny-tiny to .. not-so-teeny-tiny) and he did seem to irritate the corals to the point that the tissue died in the spots he was living in. Not the most destructive crab I ever had but not the most benign either. So just keep an eye on it I guess. It might be OK for all I know but thought I'd share my experience with it. Forewarned is forearmed or whatever it is they say..