I think one of worst patch was CC revamp.
Literally half of pvpers quit this game right after this patch came out.(atleast from my server)
Funcom changed it because they wanted to make CC’s usage more about ‘timing’(they said like this), but its far from timing actually.
Fight was more dynamic and had higher skill ceiling before. Now people just spam CC’s ramdomly because you can’t land CC’s when you exactly want. And no more fake combo CCs to make foe waste their CC breaks or momentum.
Its not fun as before tbh.
But Sin was incredibly OP with insta CC’s, so i think adjusting Sin and few classes was enough not whole CC’s.
And second one was adding ‘Energy’
It screwed all of stamina related mechanics. Who cares about stamina thesedays?