I liked some of the Boneyard match and I would have preferred if it was filmed like it was a real fight in the style of the Hollywood backlot portion of the Piper v Goldust match at Wrestlemania XII, instead of getting so cinematic.
I didn't like the close up shots of Undertaker while the druids were surrounding him, because then they move to a farther away camera shot and you see there's no cameraman standing beside him getting those close-ups, so how were the angles achieved? The camera angles have to make sense or else it takes me out of it; like the close up of Rock's face when Mankind was pinning him with the forklift during the empty arena brawl in '99, it just ends up looking stagy.
I didn't like the 'supernatural' elements with Undertaker lifting his arms and fire shoots up from the barn, or him suddenly appearing behind AJ for the same reason I hated the Matt Hardy teleportation stuff on AEW Dynamite a couple of weeks ago. Unless there's a good reason for him suddenly appearing behind AJ then I think they shouldn't do it, "he's the Deadman" isn't a good enough reason to me.
I can believe The Fiend dragging Cena into his world and causing all these flashbacks to happen against his will more than I can believe Undertaker having the ability to cause fire and teleport during what's supposed to be a real fight. I'm also not crazy about Undertaker burying a full time wrestler; a guy who'll be there week in week out for the next few years while Undertaker might not be seen again until Summerslam or Survivor Series. I didn't like AJ apologizing and begging not to be buried either; it might take a while to rehabilitate his image after that.
I have to give Cena credit for agreeing to have his career parodied and retconned during the Firefly segment and then getting dropped without getting any offence in; I'm not sure too many wrestlers with similar stature/star power, like Hulk Hogan, would have agreed to do it.
While parts of the Boneyard match bothered me they have created two new styles of match/segment in which they can involve guys who wouldn't be able or don't want to have a standard match in a ring anymore. Sting and Shawn Michaels could do the Boneyard match. Mick Foley could do the Funhouse as could Kurt Angle and Hogan if he'd agree to it and not try to nix a lot of the good stuff to protect his image. The next person I'd put in there would be Goldberg although in a real setting I'm not sure why anyone would agree to go to the Funhouse after what happened to Cena; it'd be a hard sell to convince someone to go there. The Fiend might have to steal something belonging to the person which they can only retrieve in the Funhouse. If it was the Attitude era he'd probably kidnap Goldberg's daughter and take her there.
Anyway, the Funhouse was one of the most creative segments I think WWE has done, while the Boneyard has a lot of potential if they treat it more like a real fight next time without the music (unless it's playing from an open car door), the unrealistic camera angles and the teleportation/special powers.