I don't think when hunts were implemented, the devs envisioned it to be a system where people kept track of "open" spawn windows and mobs of parties teleported from zone to zone to zerg down the marks, so I'm pretty sure they aren't going to implement anything in-game that makes this current behavior even easier.

If they want hunts to be what they intended, as bonus targets that people happen to discover while doing other in-game activities rather than what it has become now, they should make all A-rank marks have a random 1-48 hour spawn window after previous ToD. This would basically eliminate the "tracking" of open spawn windows which people are using now to turn hunts into a teleport-zerg fest.