I'm pretty sure that sprint's existence is taken into account in some small part when they design zones and areas. A change to sprint now wouldn't necessarily affect all the current zones, but you can bet that any future zones they put into the game, especially the next expansions, would be even larger to account for it. And you guys will just ask to make sprint faster, or to get access to flying sooner, or some other change or addition to overcome this tedium that the developers want to keep going.

It's pointless, just stop asking for these kind of changes.