I think we are fine as we are now, DoT wise for most DPS jobs. I prefer jobs with a proper DoT interaction (Bard, Black Mage and Summoner somehow)or integrated in the normal rotation (Dragoon) than a "push here to DoT" like Ninja.

I'm bored with healer DoTs though. I don't think they are interesting, no interaction whatsoever, there are just a weaving window one every 30seconds (and AST / SCH don't really need it). But rather than makeing them go away, I'd prefer having some real motivation to use them in a gameplay perspective.