He wasn't a silent guy in NXT either, and his promo style has been left unchanged, basically.
I mean, he will need to talk, at one point or the other. He's more concise than Bray Wyatt (his promo last night did raise some comparisons), who just went into weird tangents all the damn time and had wacky special effects, and having him cut a promo on a dark room while wearing a black shirt, with shadows covering up half his face isn't exactly bad or over-produced.
By contrast, compare his vignette with Mojo's. Dude is there busting his ass to make a promo work, with the twist that he's talking about himself, and in the latest of those vignettes, he has Luna Vachon-like makeup and a broken mirror. Still no payoff to that. They gave him more than they did with Black, yet the crowd reacted way less.
I'd say Aleister is set, in all honesty. We need to see if Ricochet is going to have the same fortune, as I don't think he's said a word on the main roster yet.