Don't know what I'm reading here. Geralt is one of the best videogame protagonists in the last decade.
I don't expect C77's star to be anywhere near as good, purely because you need to sacrifice some characterisation if you want to make them completely customisable. Hopefully they get around this by offering plenty of good supporting roles.
I would expect the former. Witcher 3 was more of an action game in terms of the moment to moment gameplay and combat, and I can see their approach with this being similar. The genre should allow for a wider range of upgrades and unique abilities to mix things up, but I fully expect those to branch off from a base of "point and shoot".