i like the system as well, just tweek it a little and all good. using a heal on glad already adds a longer cooldown from using it, if anything make it a little longer. yes they can add more then one heal but that removes u'r other moves. u giving up one move for another.
on top of that most this stuff probably helps more for grinding and getting parties going with any formation of groups, not endgame as much. pretty sure most glads won't have the points to be putting 2cures and haste on there bar over there own moves in something like dynamisis. like all have already said it's to make us all versatile, we all should be leveling other classes either way, we did subjobs in ffxi and this is just a way cooler way of doing it. and people who level more classes should have more versatility, it's not like putting my cure3 cures more then cure2 at lower lvs, it just waists more mp.
at the most archer will probably be nerfed at some point an that is just the class that is overpowered not the armorer system. also when new classes come with say like haste, it will probably help with smaller party structure to be able to mix and match rather then having to find the brd that don't want to party without specific classes and a party of people expecting a brd. (i didn't mind these circumstances in ffxi and i also like larger party groups over small but i do think it would help)
turning me after 6months into a standard class 24/7 would piss me and many off, like gaile said. i plan on leveling many classes not just one and i don't want any of them to be restricted. if they make it so i feel like a taru monk(with all the trimmings) and find myself in a game where for 5years i'm forced to play a blackmage rather then the other 8classes i have i will quit in 2minutes this time. versatility is awesome, fact i think they stole this idea from me lol, i would always say in ffxi ls chat they should of made a Shan Sung(mortal kombat character,changes into all the other ones) class that lets u use all the classes u have lv'd to 75 in one class. se has spy's in our chats!!!