In my experience the claw in my particular holster (from Hydden Hybrid Holsters)
https://hiddenhybridholsters.com/col...e-appendix-iwb
does not interfere at all with getting a decent grip. It is far below the pistol grip, pressing against my belt.
Claws do help, and as I said in a previous post it also helps for concealment to fashion some kind of wedge to push the muzzle of the gun out (and the gun grip in). Besides helping with AIWB concealment, pushing the muzzle of the gun out also "enhances" the appearance of your endowment, if you know what I mean

. Win-win. Although I know that most of us don't have a need for that.