You're a dense one aren't you? Since you can use any classes skills and there is such a huge variety, stamina is the only REAL limiter. TP and MP come so easily.. they dont limit ANYTHING, in all honesty. I've said this many times but let me break it down to a level even you should be able to understand, little one
Abilities are good!
They are so good that people want to spam the heck out of them!
Without Stamina, you have access to every single jobs abilities in an instant.
You can taunt, then provoke, then wardrum, then warmonger, then sling off aegis boon, throw in an emulate and a chainspell, launch off a random spell instantly, throw up rampart, still precision, cover, sentinel, punishing barbs, blood bath, disorient, and then chain off a couple of attacks and a weapon skill... and guess what... since theres no stamina to slow it down, you did all of this in 5 seconds.
Now you kids have fun, my shows about to come on.