They should have him really show off his skill, really being a great worker.
But in between moves, he walks like we just saw, but other than that he works great, while shouting out various things.
I think we'll see some Regal/Eugene skits like what we had with Regal/Eaton.
Wait a minute, this is probably light years ahead of thinking for WWE writing
But, if Eugene is supposed to be autistic, autistic people usually can do something incredible well (remmember in Rain Man Raymond could count incrediblely fast)
So maybe Eugene will be this fantastic wrestler, but autistic and unreachable outside the ring.
Or you could have Eugene discover his amazing wrestling ablity during a match and have him freak out about it.