You lost me on part of your post Rains. I got the first part, but the second is just confusing.

If your getting at how it's difficult to fully utilize the effect of some of PLD's and MNK's abilities I can see what you mean, but it need's a bit more elaboration. Like the following.

Rampart- Too dangerous for party members to get close to receive the AoE bonus.
Flash- Little difference between Enmity generated between Flash and Provoke (Actually I think Provoke was proven to give a little more Enmity, but can't exactly remember. >.>)
Shield Bash- Ehh, I don't see anything wrong with this ability. It does decent damage (For a PLD WS), can stun, and has very low TP requirements making it a decent for a little cheap boost Enmity Generation.
Outmaneuver- You do get MP returns with the Enhanced trait, the bonus given is laughable however, I definately wouldn't mind a boost to the amount given.

I'm just saying be a little more specific in what you want from these, sarcasm and pessimism only goes so far without clarity.