I saw Thunderbolts tonight. I liked it. Quality wise, it would've fit in Phase 2 or 3 easily. The film makers involved at the very least understood the concepts of pacing and structure. I think the biggest issue with it is that it's largely a Yelena movie, though I like Pugh as Yelena, so it wasn't a big problem for me personally, but it does somewhat hurt the film. Ghost becomes a background character after their escape from the Vault, Bucky is largely there as a vehicle to move the plot along, John Walker (who they write as a dimwitted asshole during the first half) is given a potential story arc with his family leaving him but they don't do much with it, and Red Guardian is, much like in the Black Widow film, just there for comic relief and the occasional pep talk for Yelena.
Bob / Sentry was fine, I thought they developed him well enough, and his fear of using his powers again lest he unleash the Void again puts limits on him in the future (that is, of course, if they don't just ignore his existence going forward) and makes him a sort of 'break glass in case of an emergency' option. Valentina, much like Bucky, is largely just a vehicle to move the plot along. I think most of the CG budget went towards smoothing out Julia Louis-Drefyus' face.
Some of the ideas they bring up in the film is what the post-Endgame MCU should've focused on. That is, a world without the Avengers that still has to deal with super villains, people getting their hands on alien tech, and aliens & super-powered people in general. Stuff like the Armor Wars would've fit perfectly there, maybe something like Atlantis Attacks, and would've been a good time for someone like (the regular) Doctor Doom to finally make an appearance.
