Greg responds...

This isn't exactly altruistic of me, but I believe Claw is a more interesting (and in some ways more expressive and unique) character as a mute. Yes, it's psychological. And I do believe he's adjusted since the initial trauma, but part of that adjustment involves adjusting simultaneously to not speaking. I don't see him speaking again, unless it's right before his death. (And, no I don't yet know how or when he dies.)

As for spin-offs -- assuming they ever get made -- look for him to appear in Bad Guys (because of his relationship to Fang). Perhaps in New Olympians and Pendragon. But mostly in the main Gargoyles series. I see him sticking pretty close to Talon and Maggie and the Labyrinth.