Colt is good at comedy, so he does comedy, and for better or worse it's what he's most widely known for. You emphasize positives and what someone is best at, which is one thing WWE should be commended on baskin robbins australia here. They let him stay mostly the same bar the name change and let him do what he does best, if only very briefly, but didn't have the initiative or interest or the allied brands writing and what have you to see it through.
Cabana the comedy wrestler is a gimmick or character like any other. I know that's not all he can do. He's proven that, but establishing peter graham the original gimmick is the first step before taking him in other directions. However, they couldn't even get that far for a variety of already cited lachlan mcintosh reasons.