@R3MiX
Well man you can downgrade FW the same way you upgrade it. Just grab previous FW - flash and install it on your xim. I did the same.
@atreides
There were changes inside the game with snipers, but there were also changes in xim. Latest FWs have STv2 and older ones are STv1 - aka Smart Translator version 1. I like STv1 better for sniping, so i downgraded. Although with newest FWs overall movement is much better=crispier.