Doubt it's just one patch, mate.

Then move on then. It is very simple. Complaining about on Reddit isn't going to fix anything. At least use the official forums if you trying to give feedback.

Like I said, I've been playing MMOs for 20 years and these outrages over patches is like standard far for MMOs.

Maybe it's the homogenization of classes and loss of identity,

Sorry, but I don't see this problem one bit in ESO. Classes still feel pretty different to me. I mean, all the classes can fill any of the 3 roles in the game, so maybe that is what you're feeling when you say homogenization.

The developers have said time and time again, that PVP is not their focus for the game. I love PvP in MMOs and ESO, but I've come to accept that ESO PVP is just going to be crap because the developers don't care about it. I bet most ESO players don't even care about PVP anyway.

maybe it's the over-monetization of cosmetics and mounts,

ESO's cash shop isn't that bad. I could care less what cosmetics they put on the store. It really doesn't affect gameplay that much.

Maybe the OP is just burnt out. Taking breaks can be a good thing. 6k hours in one game is a lot, I would get burned out myself.