I knew you were going to scold me for those mixed spcl and dvcl files. Both Cleave and Frenzy suffered until now because of that mess. The next beta I'm working on should finally put an end to these issues.
Regarding Berserker's stance taking few seconds to cast I probably know what may have caused it. I've discovered that the current fatigue spl still include two things which are not documented: a -2 penalty to movement rate, and a -2 penalty to casting speed, which apparently affects innates too (sadness). I'd keep the former and fix the description, while for the latter I can probably leave without it, especially if it's the cause of such issue.
@Kalindor, can you confirm your issue? Was your Berserker fatigued?
I can confirm it for BG2. Fatigue makes you cast innates slower.
P.S.
I'm not sure if this needs fixing, to be honest. It's still casted very fast, and with very little difference (+1) than vanilla Enrage.