As you state, not only after maintenance - when people will find out the exact cooldowns and spawn conditions, the dedicated hunter groups which form actually (with charging Fees for LS and monopolizing hunts), they soon will figure how to tune the Spawn/Cooldown to times off-peak and when they are able to kill it without the big crowd.

I only saw a S-Rank two times, and tbh ... they even vanished from my screen (on PC, not PS3) because it´s so crowded...

Hunt was a nice idea, but is actually no fight but zerging for some really good loot... and undoable in peak-times, because in crowded hours, the groups are getting toxic as hell..