Yeah dude. It pretty much wraps up everything making kinda hard to summerize everything that just happened. The only parts that puzzled me was all the moment Jack went jumping though sessions an time. I was losing track a little bit, but it's interesting to see how much he literally played everyone. At the same time, he kinda screwed himself... His mistakes being letting Jade reach God Tier, and not knowing The Mayor had one of those prototyping rings(and letting that Exile live). Safe to say that Jack is probably dead.
Now some new things. Lord English is now awaken(I'm assuming that's why Doc Scratch said "suckers" before The Scratch), I'm unsure about the whether the living trolls made it out of that final moment alive(Sollux died trying to pull them out). That post lady exile prototyped and has the same properties as Jack(she just has that sword... which I think probably killed Jack), and a bunch of God Tiers. "What now?" is the biggest question.
As for other things, I'm sad Mayor died. Serenity probably wants as much revenge now. That part with [what's his name] blowing up all those vessels while Jack was in pressence was... badass for some reason.