I agree with the enmity one, I, for one, am a PLD and a SCH (along other jobs). There are days I wish my PLD would generate hate like my SCH, but that's a different topic. I wish I could merit Enmity for Job Specific, hell, I'll spend more merits just for that. Let me merit a job's enmity level to what I want it to. Would help both tanks and mages.
I do tend to counter my own statements just to think of both sides. Player skill, (one merit area that I wish I could merit in, not only for myself, but others) would be at risk. We have all seen how some people play when they are in Abyssea with their atmas then are complete <expletive> outside of it. A rookie would do a better job against a NM like Kirin, King B, etc than them, and I even talk about some who leveled the old ways. Sorry, my mentality is, if you can't play the job w/o any external support minus Pro/Shell/Cures, don't play it.
Okay, I'm done with my rant... sorry.
-DP