OK, but there are a few things you also need to think about.
First is that what you are looking for is a change on how the sound is rendered, by the system, not a change in the C2 engine, or better described as a hack.
Second, the kind of timing precision you want isn't there, especially on mobile. You'll be lucky to get 0.1 ms.
Thirdly, this is why we have polyphony.
Html5 is just now barely suited to game dev, sound manipulation is still a bit off into the future. To be honest, what we have is pretty damn good considering what the api covers. I think sound engineering was one of Ashleys majors, so that might have something to do with that.
Also theres nothing wrong with using an even shorter sound for that type of situation.
Anyway, it may very well be that he can change the system to accommodate that change, however my opinion is that like it or not, it is a "feature", and I don't like getting rid of them, as you never know when they will be exploitable.