The second iteration of 2v8 is now LIVE - find out more information here: https://forums.bhvr.com/dead-by-daylight/kb/articles/480-2v8-developer-update

I have discovered two things

1) You can't interrupt survivors opening the hatch with M1 attacks

2) They still haven't fix Leatherface's chainsaw bug(which can be caused if you get stunned mid chainsaw sweeps or if you down a survivor and proceed to destroy a wall or a pallet).