Very unpopular opinion: I think the Fiend is a lame gimmick.
The Firefly Fun House stuff is fine, but the Fiend stuff is far too over the top. The mask looks like one of the dogs from Ghostbusters on a night on the town, with the hair style not helping things, the pantaloons make me think of 16th century Holland, and the "HURT-HEAL" gloves make me think of the kinds of Create A Wrestler's I'd make when I was 10 years old on the old Smackdown games, tryhard stuff from a child's imagination.
I'll give them credit that, Hell In A Cell aside, they've booked him well, but Bray looks more hysterical than scary in his attire and mannerisms. I realise I'm in a minority on this though, but if his Fiend persona was closer to his old gimmick, then it might work for me.