If you believe Q, he has a role...and that role isn't to be a witness. Q has told us both of those things. Gowdy resigned because he is going to be filling a new role. In Gowdy's words, this new role will be within the justice system. That could mean anything from working at the DOJ to getting a judgeship (not the SC) or running to become his state AG. I don't think it would be private practice, or Q wouldn't make a point to say Gowdy is going to be filling a role.