Simple, small PLD change..

[TouchandFeel]

If the devs were to provide a tier 3 attack for the Riot Blade combo, I would much rather it be an attack without an enmity modifier, possibly providing the 10% slashing debuff that SE provides (so that offtanks provide the slashing debuff while tanks focus on enmity generation and the mitigation debuff), so that OT PLDs actually have the option to generate appreciably less enmity than they do while MTing while using a different rotation (like how WAR can use BB>SE or SP>SE while OTing) to prevent pressuring the MT (though I doubt it'll be a major issue in 2.1 since the tank stances are getting an enmity buff that should upset the roughly equal enmity generating state that currently exists between Shield Oath/Defiance and Sword Oath/no Defiance).

Pretty much I agree with this. I am all for the addition of another attack to combo off of Riot Blade so that there is a little more complexity and flexibility to basic combat rotations (or lack thereof) for PLD, but enmity generation should stick to being the point of the RoH combo. Having a different debuff like the suggested 10% slashing debuff or maybe even another one that could stack with the WAR's debuff would be nice so that running with a WAR and a PLD is even better. Another possibility could be something that plays off of the usage of MP, such as a proc that would make the next cure used by the PLD auto-crit or maybe a timed buff to Mind or something like that so it plays off of Riot Blade generating MP while helping to promote the use of the MP gained.

As for Awareness and Tempered Will ... yeah not much more to be said that hasn't already been stated many times.
One is busted and causes more harm than good (Awareness) and one is incredibly situational and under-utilized by the current content (Tempered Will). Both are fairly lackluster.