You see the same thing on the Modern warfare subreddit. I think every second post is on how game breaking it is becuase they don't have a 5kdr anymore.The fact it IS working correctly is what people are moaning about. Loads of people on Reddit are moaning that they can't have 6 or 10 kill games or 2k damage games and 3-4 wins a night anymore as they're paired with 'pre-made sweaty squads with comms' and they get murdered in short order. What they're really complaining about, although they'll deny it, is they can't stomp a public server with lower level players any more and they have to work harder and smarter and they refuse to improve, adapt and make themselves better players.
On a positive note for myself, I haven't changed any undervolt settings yet but not had a single crash all night. Strange!! I initially fired up it to slowly lower until I thought it would be stable but it has been solid all evening.