WRT is the one case where you really just want to add to the maneuver that "you are not considered your own ally for the purposes of WRT". Clearly that's how the maneuver is designed. Though really, the best thing to do probably is to state that "in one encounter, a single creature may only be targeted by WRT once". This prevents certain extreme corner cases with Ruby Knight Vindicators, while changing basically nothing for normal use of the ability.
It's a great ability to rule On-Intent basis; by RAW it functions against everything with a duration, but takes a Standard Action to initiate. This really works just fine, to be honest, as long as you let it negate Light Dazzledness as opposed to the sun, and still have it end the AMF rather than just negate it (trust me, there's very little that matches in power to having your own personal AMF you aren't affected by).
It requires a questionable reading of the Aptitude-ability. Just use it as intended; to apply feats normally applying to one weapon that could apply to another weapon (such as XWeapon Proficiency, Weapon Focus, Improved Critical and so on) to this weapon instead.
This, again, is simply a lenient RAW reading; strict RAW reading states that you have to roll maximum damage, instead of having your lower result replaced by the higher result.
In other words, these two abuses don't even really require houseruling to fix; it's enough to just read them in a certain way.