The problem with "Instant OFF GCD" abilities makes combat feel less rewarding.

[cfStatic]

It's not... I play warrior and I can use a Non GCD Ability before my Global Cooldown ends.

Example:

Heavy Swing -> GCD -> Foresight -> GCD Ends and I can do Skull Sunder.

You have to time it properly. You get one Non-GCD Ability per global.

This Is STILL Final Fantasy, and still requires thought and strategy, not button mashing.

If there was anything worth considering or requiring of thought process / strategy, you might be right. As it is now, I just pop a buff or non-gcd damaging ability and continue on with my rotation. There are much more important things that require my attention at any given time than trying to micro manage shit that doesn't need to be micro managed. This isn't turn based combat, and a GCD isn't a turn. Real time combat should be that: real time.