Tanks do lack enmity generation before they get their tank stance or 3rd combo, running the first 3 dungeon, is probably the most terrible experience as a newbie tank IMO. Not only do you struggle keeping aggro for trigger happy DPS (mainly Bard,BLM,Lancer), since they can generate enmity super fast since their best move all do over 140 potency, if not more (BLM, mainly), that's not counting when some classes like BRD and BLM do AOE, it put even more stress, wasting more TP/MP from the tank, then when the fight is done, he has to wait a bit to regenerate.

I'm a veteran tank, been recently trying to level my WAR to 60, and it's amazing how terrible tanking is in lower levels, when DPS make as much enmity as you, unless you pre-enmity combo an ennemy, they'll always be on your tail, and then we wonder why there's so much more DPS/Healer, than tanks. It's all about the introduction.

Imo, SE should make some special weapons for until they get their respective tank stance (30 war/ 40 pld), that boost enmity generation, or just slap that stats on current existing weapon.