Eh, if they fix the latency then I'm sure animation locks will be ok. I don't agree on doing a six hit weapon skill and then being able to skip off whenever you are done. On a 6 hit weapon skill there should be some "recovery" / "animation lock".
On the same token you should be able to choose between abilities that have this animation lock and those that dont.

Pierce, Full Thrust, Heavy Thrust = No Animation Lock
Chaos Thrust, Doom Spike = Animation Lock

I guess use a little common sense. A mage setting off a HUGE AOE MONSTER CURE should need a moment to recover after the cast. SE should supplement the mage's spell and ability list with some stuff that doesnt lock you up. A quick Regen or a smaller cure with a longer recast but no casting time. Mix it up I guess so the player can decide depending on playstyle or what the party needs at the moment whether or not the player will suffer from "animation lock".