Styles' win was a great surprise, it definitely made the champion vs. champion match much more exciting.
The Shield's whole momentum kind of vanished before it even managed to reappear because Roman's gone. The word is he'll be back on Monday, though, so maybe they'll get things finally going. Anyway, I'm happy the championships are out of that equation, plus I really like Cesaro & Sheamus. The Usos match should be fun.
I'm a little dissappointed about Cena being the fifth member, I was expecting maybe Kane (some are saying he was originally drafted to SmackDown, and he vs. Strowman would have made sense that way), or maybe even Daniel Bryan, but sure, that one had like 0,5 % chance of happening. Elimination matches are in any case pretty much always to my liking.
Natalya's title reign has been in a weird spot as she hasn't really done anything during this all. That one match against Charlotte which ended really weirdly. So sure, WWE could still spice things up even more with yet another title change before Survivor Series.
I've been wondering what role Zayn & Owens will play during the SS, surely there's something for them. I just don't know. Maybe they'll cause Team SmackDown to lose or something.