Anawie's hammer strikes true, pummeling the nail for 9999 points of damage. Yet somehow still misses the point.
This is exactly what people don't want, and exactly what people are afraid of. Why? Because you don't see people camping King Vinegarroon or Jormungand for the thrill. People only camp mobs with good items, and most people, while they want good items, don't want to go back to the virtual MMA cage that was old HNM.
Some people liked it in the MMA cage. Bully for them, but be aware that a lot of people felt forced to participate and detested it. Of course they're going to oppose the suggestion of bringing anything like that back.
If you really don't want to indulge in elitist fantasies of being 'the best', then make a multi-LS event out of it. Shout it in Jeuno, post it on forums, send /tells to all the old HNM shell members you remember on your server, and then meet up at Vrtra. Whoa baby, the thrill is back! If anyone comes...
A small minority asking for a niche play mechanic that's actively hated by a slightly larger minority and of massive indifference to the majority... This probably has as much chance as open world PvP.