I like V. I liked their story, their relationship with Johnny, and the their voice actors. That said, I agree wiith what others have said: V's character wasn't fleshed out enough to really feel attached in any particular way and the sequel would do better to just make references/easter eggs about V. I think the biggest problem was that while it feels like CDPR was able to capture V's voice and style (i.e. Cyberpunk edgy) there wasn't much character behind them. As Dr. LaBrat said, probably a symptom of balance character freedom v. character study. I don't think it's impossible to have the two together, just need to flesh out more character personality choices, but that is a lot more work and more voice acting.
I feel like the above just means that we should have a chance to expand on V's character more in the sequel.