I think the point I (the guildie he mentioned) was getting at for this idea would be just a way to alert people that its up so that people can get there before its totally gone. The same guilds would still get it who already do, and there are already fights. Nothing would change except for the fact that people would get the chance to get there before it was killed and looted.
I think there should be sent a message across servers when a boss dies instead of when the boss spawns, people sit there waiting for when it does spawn. That message would ruin the whole idea of patience, most if not all guilds are willing to hold the bosses for everyone as is. And notifying people of when the boss spawns is bad when certain guilds cough DL cough have been known to try and steal bosses from other guilds while they're up like they did from SJ I think two times now.
I like the idea of having a NPC that appears similar to Krolin though (maybe have it stay up until a normal hippo spawns so 6~9 hours), that'd solve a lot of problems for people.
As far as stats/equipment goes, less channels makes it pretty awful, if everyone wanted the set in the 5 or so guilds on Artemis (which why wouldn't they, it's the best set) you're looking at 100+ people, 3 pieces per person, 5 Proof each..
100 x 3 x 5 = 1500 Proof, 10-15 per boss... 150 bosses or 100 bosses, these are pretty idealistic values (I suspect the number of people is a little on the low side) but with Mandara having one channel you're looking at 4 possibly 5 bosses that are doable if someone does Lagusen. Every 72 hours so ~100/4 or 100/5 = 25 or 20 then multiply that by 3 days and you get 60~75 days for the server to all be geared IF and only IF they're not pulling just for stats and they're taking the first piece of gear they get.