Could've been so much better...
I was really looking forward to this sequel, and I'm sorry to say that this is the first Marvel film where I thought the writing was really sub par. You have a jumble of story lines with no real cohesion. Scott's trying to avoid getting caught breaking his house arrest whilst helping his buddies with their startup security firm. Dr. Pym and Hope are trying to rescue Janet, who's still in the Quantum Realm. Ghost isn't even really a villain, and is just trying to steal Pym's tech to heal herself, aided by one of Pym's old partners. Also throw in some sleazy redneck mafioso who's also trying to steal Pym's tech (Walt Goggins, woefully miscast in my opinion.) Lang's daughter has some good moments, but his ex-wife and her cop husband are relegated to very minor slapstick characters. The fight sequences didn't wow me, and most of the humor was a bit juvenile--unless you think a large ant playing drums is utterly hilarious (I do not.)
For me, they went for too much of a "family" vibe. There's no edge to the movie; it may as well have been rated G. There is, however, a cool sequence in the Quantum Realm (though no explanation of how Janet survived down there for so long), and the ending itself is a nice cliffhanger which ties in directly with "Infinity War."
Really hoping "Captain Marvel" is a couple steps up from this one...