I think the larger problem here is the latency, not animation lock itself. Most of my deaths fighting Ifrit come from the fact he readies an attack, let's say, Eruption, and unless i start running immediately, i will get hit, even if he didn't finish casting when i started to run.

So if they never manage to fix server latency issues, then they should consider removing animation lock. But if they do manage to reduce it to acceptable level, then there I see no reason to do so.