I am hesitant on it, it is very anti Final Fantasy to me, but this is how every other mmo is. But if you think about it, it makes sense.

How often do people use say raging strike 1 over 2, and say scourge 1 over 2. So people naturally replace the lower tiers with higher especially since most think even share a global cooldown.

SO remove all tiers and make things grow with you... issue is square better make the animation change as you get higher. None of this rank 2 animation crap at endgame. (honestly this is my biggest fear) So thunder at say rank 50 better look different that at rank 1-2 or what ever they changed those spells to.

I have to see it or get alot more info on it before I can judge if it is a good move, or something that will piss me off and alot of other ppl.