I rather much enjoyed Vol 2. I haven't rewatched the first one and it's been long enough in my rear view mirror that I can't really make a ranking of them. I do think Kurt Russell's Ego provided a rare satisfying villain, by MCU standards.
The music was every bit as good as in Vol 1, even woven into the plot in one instance.
Nerd nit-pick: I wish Ego had said "lower case 'c'" when he said he was a Celestial instead of "lower case 'g'" for god. We met the Celestials in Vol 1. They looked like what Celestials look like. In the comics, Ego is considered one of the Elders, along with (among others) the Collector (Benecio Del Toro in MCU) and the Grandmaster (Goldblum). It could be said Ego is more Elder adjacent than strictly a member, but regardless, he's certainly not a Celestial. Anyway, this was merely a nerd annoyance and didn't affect my movie score one way or the other.
I hope in Vol. 3, Drax gets some action sequences. After the opening scene, he was comic relief and nothing else. He was funny as comic relief, but he's supposed to be a major ass kicker and we didn't see that. Maybe next time.
As to Yondu's death, I suffer from Marvel jadedness. No one stays dead, especially when the team he's a member of (original GotG) is shown together and oh, they happen to be proficient at time travel (from the 31st century in the comics).
I'm very excited for Adam Warlock, one of my top 10 favorite Marvel characters.
I loved Stan Lee with the Watchers. I would have taken slightly more pleasure in it if instead of referencing appearing as a FedEx delivery man, he mentioned being a hot dog vendor to show he spans across the cinematic universes.
To other things - The Inhumans' pic is pretty cringeworthy. It looks like something from 90s superhero live action. Maybe Lockjaw will save the day.