I don't think Moxley is a Terry Funk clone. But I also would not agree that nothing about him feels copy paste. He kind of is a pastiche at times, not taking from any one wrestler, but like a Tarantino movie knocking off several things at once to end up being something different. He has lifted from Terry Funk, Roddy Piper, Steve Austin, Atsushi Onita and more. And in more than just the applying classic pro-wrestling techniques to his own work way.
Not a dig at Mox, he's great, just an observation.