I played it both at launch and a year ago with the DLC. It's alright - 6/10, but pre patches like 4/10.
The gameplay is fun because of how customizable your build is now, after the skill system was completely reworked.
The story is shallow, the characters forgettable and the open world really doesn't fit the urgency the story is supposed to have and ruins the pacing. The DLC is much better, but there's some parts where I don't really like how V is written, especially at the start, since it forces a specific personality I don't think fits them.
I remember the sidequests being generally entertaining, but I wouldn't call any of them special, just kinda average.
It feels a lot like a Far Cry game, but with much better build customization.
Probably average wasn't the right word, as I don't really think sidequests are generally good storywise in games. I wanted to say "mediocre" but thought that sounded negative. I meant that I didn't find anything special in them, neither bad nor good.
But for examples of games with sidequests I think are good (storywise), I can think of only The Witcher 1 and 2 and Yakuza 0 (all of which I haven't played in a while so I might only remember the good parts).