This is what I find problematic about PTA for some genres. When conflict's boiled down to one roll, the mechanics are unable to generate a feeling of tension, because it's over too quickly. Further, it's very difficult to keep the single decision point from being extremely random. To go to the other extreme: Champions combats are so many die rolls that you tend to get the expected outcome, which is why balance is so damned important. Somewhere in between, you have Feng Shui, which uses 2d6 for a fairly swingy curve. This is an excellent simulation of the unlikely events of a Hong Kong action movie.