Okay, I really don't understand this three minute timer issue. Aren't ZNM pops and drops both Rare? Meaning you can only carry one at a time to the pop site. Meaning that, unless that particular ZNM is over camped (which at these server population levels is near impossible), then you are only going and popping the NM once? Meaning the three minute timer between pops for an individual player is absolutely meaningless?
Just recently I went through this process myself to complete my Yagrush, and the one biggest time factor in ZNMs I found to be simply the time spent getting to the pop sites, so if you are really complaining about the time spent on these things shouldn't you really be asking for warps to the pop sites like those for voidwatch and unity?