Thats a good idea but then you would have all of the people who did not hunt NM before because they thought they would never get it crawl all over the mobs that drop the item. It would not solve the problem, make it worse even..maybe. Instead of a few hunting the NM, everyone will be hunting the regular mobs that drop the pop items.
The problem if you ask me IS the timers, people know respawn times. Now if you set all HNM and NM on a random timer, there would be no real camping of NM or HNM. The mob could pop,oh once this week, 30 times next week, none the following week and at completly random times. Sitting at the spawn is worthless since you could end up waiting days for it to pop. So chances are people might spend only a bit of time camping it daily, instead of "Oh, well (insert HNM) spawns in 30 min, lets prep up and go see if we can claim it today."
Would also keep players from "owning" H/NM. They would have 2 choices, pray it spawns on the time they camp the area, or b wait for it to spawn and hope they get to it first. That way everyone has a chance, not just NM hunters, or gil sellers. Of course, yeah prices would go up blah blah. Not if done right. See the problem, for lets say, scorp harness, is not enough claws for demand. Ok. Have Serket spawn randomly somehow. He can spawn 30 times in one day or not spawn at all for 2 weeks, of course not using those exact numbers but you get the point. So hey, at times there might be enough for everyone, price goes down, and when there isn't price goes up. Yup, there we go, just like real life economy. The randomness solves a lot of probles imo, and the fact that it's possible it can respawn more times in the same day, who knows maybe even 5 min after it dies, it's a change that more claws will inflow then the normal 1 a day IF it drops. Of course it doesn't screw econmy either by have like 200 claws on the AH, since at times the damn scorp won't even spawn that week.
Eh, they also need to fix claim issues, tired of claim crap. One group claims it BAM, done. Even if everyone unengages the NM or monster or whatever, it will stay claimed until every single person in said pt or alliance leaves the area or dies. Only people who would have a problem with that are the thieves, right? If a fucking group claims the HNM it's fucking theirs until they fail to kill it, be it 20 hours or 2 min. Most groups wait until for a second the mob goes unclaimed, or whatever reason. Some try to hate steal the mob out of range. With this people won't even bother, since they can drag that mob where ever the hell they want, even into zones they know will kill the claimer, but the smart claimer knowing the nice new claim change will simply wait since as long as he stays there it will still be his. Eventually the theif will die, get bored, or give up and leave, and through another nice little change in hate/claim, the monster will come back to the original claimer. As for lingae, linking mobs should only garner hate towards the current target of the leader mob. So a goblin NM that links other gobs would only go after the thief, and the linked mob would come back (not truly having hate, so it doesn't link, but it still goes back to original claimer, not hard at all to do) and then once that player attacks it or garners hate again then the mob can link so so.
Think about it.