I wish he had better defense numbers overrall, and while I see Charlie-27's shooting clicks' combat values being correct, they're wrong for the cc latter half. This is probably going to be the ONLY Charlie-27, so the Keeper's defense contribution and support will be very important for the ta'd GotG. I look forward to having a full and huge GotG vs Dormammu/Mindless Ones battle. How balanced is that, I wonder.
I think you get a lot for 92 points, you can break invulnerable pieces on every click.
He reduces damage by 2 on every click.
He can replace his defense value, there are a lot of pretty cheap 18 def Wild Cards or Defenders.
Throw on the Gaurdians ATA and you have an unoutwittable, piece that can reduce damage by 2 on every click.