In terms of it being called Ant-Man and the Wasp (with the cute fact that "Quantumania" hides Ant-Man in the center--quANTuMANia), I almost think that it could be called Ant-Men (Ant-Mans?) and the Wasps considering the roles that the original Ant-Man, Hank Pym played by Michael Douglass, and Wasp, Janet Van Dyne played by Michelle Pfeiffer, have in this movie. In fact, I think that Michelle Pfeiffer gets more screen time (and certainly more story focus) than Evangeline Lilly, who plays the new Wasp, Hope Van Dyne. With that in mind, the movie title should include Ant-Girl--Cassandra Lang who is now played by Kathryn Newton (who replaced Emma Fuhrmann from Avengers: Endgame who replaced the much younger Abby Ryder Fortson from the first two Ant-Man movies ... even though she would really be the correct age to play the comic book version of Cassie at this time) who is also a major focus with a massive amount of screen time in this movie--all of which is worth it.
I do understand some of the critics' concerns regarding the movie, but I'm glad that their opinions did not keep me from seeing this enjoyable (if often messy) film. It's just a shame that they didn't have a place for Michael Peña. I don't know where they would have put him, but the movie did suffer from the lack of his character. Still if nothing else, it's worth it to see Jonathan Majors chew the scenery as the MCU's new "big bad" and to watch Paul Rudd just be the adorable Paul Rudd that he is.