I don't really know if I can trust any of wonderguy's opinions, first he super creeps on Gal Gadot and now he WALKS OUT on this movie? Like I can totally understand walking out on Mother! or Transformers 5 because those were shitty movies but walking out on an action movie... sounds like a low testosterone problem, may need a medical checkup.
I saw this today in IMAX (thanks moviepass), it reminds me a lot of the John Wick franchise problem: the second one is stylistically very similar to the first one, and it has the main cast return, but it doesn't really do much new and the bad guys aren't as good as the first one. I don't really blame a sequel for not breaking new ground, but man John Wick 1 and Kingsman 1 both woke you up at the beginning of their movies and said "fuck you, this isn't like anything you have seen in a while, now sit down shut the fuck up and enjoy your popcorn". Whereas the sequels are just kind of ... what you already saw, just more of it. I rewatched Kingsman 1 last night too so I could refresh my memory on the chars and settings, which I think anyone who wants to watch 2 should do since they dip a lot into the 1 story.
The bad guys are definitely not as good, Julianna Moore makes a decent fem-Samuel L Jackson but the douchey sidekick is nowhere near as cool as blade girl from the first movie, who seriously stole that movie. I don't think anyone in the world will remember even the name of the sidekick character in this movie, he's that bland and forgettable. SLJ and bladegirl worked awesomely in the first movie together, whereas Moore is just left to kinda ham it up here and it doesn't work without another strong villain.
The best thing about this movie was Statesmen, the american version of Kingsmen. I would totally watch the fuck out of a Statesmen spinoff, hope they get to it. Also a problem is with so many characters Eggsy kinda is on the sideline for most of the movie, and he never really is "important" to the plot which is kinda weird. Action movies like this need to keep their focus on a single character the entire way through, not sorta wander around shining the spotlight on guests.