I am not complaining about gameplay, just posting general issues, which reappeared with 2.5.
1) Huge frame drops. Most noticeable when there are lots of players on the screen, one can be wielding strength. Very similar to bug div fixed in post 2.4.2 (dynamic lightning with strength/shield taken).
2) Buffered input. Old problem came back. Sometimes you can't control yourself, because old input is executed. Happened after minimizing/restoring window.
3) Players are noticeably slower (like they are moving in glue), but also surprisingly became much harder to hit. For me, they are not flying into predefined directory any more, but looks like their warping in small steps. Might be caused by my addiction to 2.4.2 physics, so might be a problem from my own perspective only.
4) Mouse issues were already posted in other threads.
Sorry, wrong section. Please move to Support/Bugs.