Yeah, I have to admit this is one of my weak points. As demonstrated by the blinds suggestion tool. It is based on the common axiom that the tournament will end soon after the small blind (or is it the big blind?) reaches the starting chips value. But the schedule it creates almost always needs some good solid tweaking.
Regardless of whether or not this is within my ability, it's a great suggestion that I have not heard before. I'll put it on my list and give it some thought.