Charm breaks on the universal server tick, so this should happen often for classes that don't use CHA for charm, and even a little often for those who do. (Cha is for bard and enchanters charm only, every 6 seconds mobs roll against their cha before the secondary roll with the MR and level adjustments.)

It's been about the same for me. Haven't noticed any significant change.

What's most unclassic about charming on P99 is that nearly every single enchanter here has stacked CHA to max (or as much as they can), has jboots, has GGR, has GINA audio alerts, has a wiki to tell them the best charm candidates, and, most importantly, has < 100 ping.

The audio alerts and < 100 ms ping alone have let me handle charm breaks no problem on P99 that would've easily equaled death in classic.