Have finished the main storyline and still like the story aspect of the game. I also like the side-quests and that's clearly one of the big strengths CDPR have. They know how to tell stories whether it's the big ones or just smaller ones. That said, I can see why people might feel disappointed with the game on the whole (even not taking into account the various bugs and issues with stability). The game simply is nothing special in terms of what it does in the open world (not that I think The Witcher 3 was much better in that respect, but there will probably be a lot of people who disagree with that).
The core of the game for me is still the same as in W3. You have a main quest to follow and you have loads and loads of side-quests. The only difference is the way you get those side-quests. In W3 you have to go to a place and actually pick up the quest (although you can do it in bulk picking up every quest on a message board). In C2077 you just drive around, get phone calls or texts and you quest-logs just keeps filling up. As I've already said that's not really my cup of tea. I like my open world games to basically guide me through the world. I hate that "Do whatever you want approach". The sad thing is, that it would really have been a good option to have you go from place to place and doing jobs for one fixer after the other to climb up the ladder. They could even have connected the main quest with those fixer side-quests to give you even more of a feeling that you're progressing. The way it is, the game feels to me like they just created a huge city and then splattered (main/side)-quests all over it and then filled up the empty space with crimes or gang-related stuff. As I've also already said, they make a big deal in the beginning of the story about how you're now working with Dex who's this legendary fixer and he doesn't work with just everyone who asks nicely. Once you finish the prologue or whatever that is, that whole concept is just thrown overboard and every fixer in the city just calls you willy-nilly to give you one mission after the other. That just feels wrong.
I'll probably wait a bit before I start my next playthrough, but I will definitely play it again with a different background story for V (even if that doesn't really make a difference), because I simply reached a point in this playthrough where I couldn't be arsed doing all the side-stuff anymore. I wanted to know how it all ends and just decided to not do the other stuff (like the Rogue storyline).