Or Tiki just couldn't handle Insane Power so he went crazy? Aside from even less sanity than Boric, their transformations weren't that different. (Jasdevi is just kind of odd.)
Anyway, if anyone can deal with Tiki like that, it's the Earl.
As for the doors, they probably shouldn't have been there in the first place. It was a Tiki-Road collaboration to lead them there, wasn't it? We also still haven't learned if the Earl knew about/supported it; it's his Ark, after all, and I would think he'd have his attention on it. Cross's appearance was probably an unexpected thing that led him to show up, since Cross originally wasn't there. (Boric, Jasdevi, and Tiki all got owned by their stupidity in confronting the Exorcists, and Road admitted to losing her game. I'd think that dying - or at least getting beaten up pretty badly - is a good punishment.)
The Earl said they needed to change to something that had "better qualifications". The reason they need a new Ark is because the traitor Noah screwed the last one up about three years ago, and things don't work as well. Cross wanted to destroy the Ark because it's also where akuma are born (or so Chomesuke told the Exorcists); this was before the download issue came up. As far as I know, the only reason for stopping the download would just be to save everyone inside. I don't think that was a concern earlier.