This is the main reason I've moved past concept-music and theoretical systems. The ideas themselves were beautiful from a logical perspective but composing with them was kind of like hitting the '=' button a calculator and the musical result would usually leave a lot to be desired. This approach wouldn't leave much room to fall short of the original idea, but it definitely fell short of being musically stimulating (for me). For some people, composing with systems and concepts produces music they like by a comfortable means. I now prefer a more open-ended approach completely guided by intuition. I definitely fall short of small-scale things from time to time with things like pacing, direction, etc. but I'm trying to accept more of these things for the sake of keeping up creative momentum.