I get that Folk won us the most recent game, but I'm still firmly in the camp that he needs to be replaced ASAP. We very clearly avoid letting him attempt 50+ yarders, which at this point in NFL history is borderline routine for kickers to make. The Jets game winner is his only make from that distance all season. That's replacement level kicker stuff.
Thus, Onwenu is the clear MVP so far. If Harris had been able to play more games it would be him.
I'd also argue that no player on the Patriots right now has made more impactful positive contributions to the season than Newton. For all his turnovers, our offense pretty much only ever sees the end zone when it's Newton running into it. The problem with him is he's also made more impactful negative contributions than anyone else.