Someone once suggested to me that the interesting part of Truenamers is their "reverse" feature. That many utterances are two spells/SLAs in one is really the reason you'd want to play one (even if that still isn't super powerful). I have to agree. I no longer require True Speak checks to use normal utterances. The "law of resistance" instead means that you must wait a number of rounds (which goes down as you level) before using the utterance again or use its reverse, allowing to use it once more after the reverse (and the reverse has the same "resistance"). It doesn't give them a huge boost, but even on its own the change makes them quite a bit more playable.