Animation Lock: Why don't you like it?

[Radacci]

both of them are methods to prevent spamming skills in short periods of time. we are getting one in place of the other.

you know what's good way to prevent spamming too? TP. if you could spam skills, you'd run out of TP within a few seconds, then you couldn't spam anymore. problem solved.
GCD is probably just there so PS3 users who need to navigate skill bars, can stand a chance in PvP for example, or don't fall behind to much in DPS department in raids etc.
Animation lock doesn't prevent skill spamming at all.