Working with AD nails is possible. In Frank Tierr's Weapon X (vol 2) where he wrote a proper Sabretooth, Creed was an expert hacker that got into the computer database to steal all the mutant files. So he can work a computer, and a keyboard -even with AD claws.
Just not in Pak's series where he's a brain-dead hillbilly. Tbh, Pak writes Creed like someone who got stuck with him by editorial. And I hope that's it, because he may write him out in the roster change.