I've seen the movie. Enjoy my ramblings
It's not very good. None of the new characters are particularly relatable or fun to watch. The story is a retread with a twist but without any of the charm. The CGI is great (except for some murky green screen) but it doesn't save the movie. Just like the first movie, this one doesn't have constant action going on. That's okay, if it weren't for the fact that the slow scenes are boring. Half of the movie is spent in those cliché dark war rooms. In fact, most of the movie is dark. The score is barely there, except when the theme comes up at the end.
The movie takes place in a more advanced version of 2016 which is an interesting idea (we used the alien technology to our advantage) but it takes the movie so far into sci-fi territory that the color palette and set designs are very stale. It doesn't feel like the world we saw in the first movie. The only people who keep us grounded in that world are the returning cast members. Goldblum has a healthy chunk of screentime but he doesn't do much of anything in that time. There's a new comic relief character that is cringe-worthy to watch. Emmerich creates "drama" by having characters make nonsensical decisions. Oh, and do you like that "we have to fly out of here, the door is closing and we JUST gut out in the nick of time" trope? It's used a hundred times here.
It surprised me how nonchalantly the movie treated this disaster. The movie pokes so much fun at itself (mostly through Goldblum and his in-movie father) that it self-detonates. The stakes are gone. We get obvious callback scenes with speeches that aren't nearly as convincing as the presidential one from '96 and old catch phrases are forcibly resurrected.
Lastly... this movie has the most obvious set-up to a sequel I have ever seen. Sadly for Fox, I don't think people will be clamoring to see more. I know the words are used to death but... this was an unnecessary sequel that nobody will remember à la Genisys.
Is the movie absolutely irredeemable? No, if you liked the first one, by all means go watch this. It's only 2 hours long.