Honestly, why all anti-TPP people are worried about delays? Did not CDPR people say that the game will be out when it's ready?
There's no ETA on game release. We do not know how long they have been actually working on the game (didn't they say that development properly started after last TW3 expansion was done?).
So what delays are you talking about?! There's literally no release date yet!
To be fair, adding an extra camera mode (or really anything) that wasn't originally in the project scope...it's reasonable to expect that does involve more work and therefore it might (perhaps likely) cause a delay. How large a delay depends on how much extra work is added by the new feature and that I can't really guess at as it's outside my knowledge area.
There's no publicly announced game release date but I think it's likely that CDPR has one on their private company timeline. They just don't want to announce it yet in case it slips.
I've seen a number of people claim "2-3 years" in this thread and I don't know if that's reasonable or not but SOME delay for adding something new that wasn't originally in scope seems likely.