I can kind of sympathize with this, but mostly for Pld, not the other two. I mean, for Pld, Awareness couples with Bulwark and is usually only used for improving the efficiency of Bulwark (unless you are expecting a Crit... somehow... psychically...I dunno). Given that Bulwark is a PAINFULLY short buff on a PAINFULLY long timer, Awareness outpaces it by a lot. The cooldown Timers don't even line up, so you end up holding onto Awareness for extra time while you wait for the obstinately long CD of Bulwark.
For War's, Awareness is too short by 5 seconds. At either the beginning or the end of Raw Intuition, they are vulnerable to extra Crits because, despite the CD timers lining up, the buff timers do not.
Dark Knights, actually, seems to get the most balance out of the timing of Awareness, because it is possible for a Drk to time their awareness/Dark Dance combo in such a way that they can pop Awareness with Dark Dance on every second cast of Dark Dance. Meaning they can Dark Arts + Dark Dance > Dark Dance + Awareness > Dark Arts + Dark Dance repeatedly throughout the fight, saving them MP on every second Dark Dance cast by not using Dark Arts but keeping up an (at least better than default) efficiency of mitigation using awareness. The difference is, instead of increasing evasion you're proc'ing more parry's. I haven't done the math on how well it compares to the DA buff, but it seems to be working out pretty well for me so far.
The way I see it, the most essential "fix" for Awareness really only requires adjustments for Pld (which should be priority 1, given it is their move to begin with). Only, you'd be adjusting Bulwark, not Awareness. At the very least, Bulwark's CD timer should be reduced to 120s so that it matches Awareness. It would be nice if they extended its duration to be the same or at least close to Awareness, but I don't want to be greedy (though, to be perfectly honest, I don't think it would be all that greedy. After all, if a Dark Knight's Dark Dance can last for 20s, I don't see a reason why Pld's Bulwark only lasts 15...). In any case, the CD timer should match since, right now, the awkward timing of them both makes for a clunky rotation of buffs.
For War... Ideally it would cover all of Raw Intuition... but I don't really see this as pressing. Asking the War to pay attention for an extra 5 seconds is hardly a problem. They have the most balance out of this move already. It can just stay the way it is.
For Drks.... Could also be left the same, really. They get pretty good efficiency out of it already, so don't change what ain't broke, as far as I'm concerned.