Okay. I'll bite.
I think that mob repop times should be at least partially dependent on the proportion of mobs that are up of the same type locally/zonally/regionally. This encourages an understanding of realistic population dynamics and sustainability. I'm a naturalist, so the idea of a repop rate that remains constant regardless of a population size seems, to me, to be overly simplistic. Adding this complexification may get people interested in the
logistic map and the dynamics of chaos.
This can lead to creativity in both directions. Killing darters would keep them from popping as often in Aery, and controlling their population uphill can affect their repop times considerably. On the other side, going to not-busy zones can be advantageous for exping with rapid repop times. Everyone likes quick repops in exp. Right? But too few of us think about how one's social choices affect our exp experience.
Just a thought. I was not a math major, so some input from the math people would be awesome.