Move-sneaking was broken. There were other elements of 3.5.0 that were bug fixes, corrections to abusable spaces, and reversions to things prior that were desired (AK-47 secondary fire and Volkov's napalm grenades, to name a couple).
The tesla buff didn't actually happen until 3.5.1.
So far, these have played terribly in w3d. Do you have an idea for them that would make them fun to play as and okay to fight against? How do they actually contribute to a team?