I think you are worrying about a scenario that by all accounts would never happen or be incredibly rare. Do you really think that Poopsock Pissbottle (yah I stole this from Gerick) and his two friends are going to spend weeks camping a single adept in the level 30-50 range when they can do basically nothing else with their characters while they wait for it to respawn? I just don't see this happening. The type of player that is obsessive enough to want to get every piece of adept loot is also the player that is not going to wait around at the lower levels when they could be getting to 65 and raiding.
Let's say that this does happen and the group ends up killing this one adept 4 times for loot. Let's assume the respawn for this adept is 3 days. Day 1 kill, Day 4 kill, Day 7 kill, and Day 10 kill. So they locked down a SINGLE adept for a grand total of 10 days. This also assumes that they beat others to the adept but since they only require a force of 6 now, there is going to be more competition. I just don't see this being a problem.
The fact is that adepts in this range are left up for weeks because it is near impossible to get the required number of people to attend. People want to level up their toons rather than wait around to kill an adept where the loot they want may or may not drop and they may or may not win the roll. I still maintain that it is better for there to be some actual competition for adepts rather than them sitting around untouched and unloved fpr long periods of time.
Edit: If you are really worried about one group of 3 boxers killing a single adept over and over again just add some randomness to the respawn timer. For example 3 days plus or minus 6 hours.
I have one thing to say to that whole wall,
Digested Hexdoll. I have known many, including myself, who have halted a toon's progress to get this piece of loot. It is awesome for every class because of that clicky. Tanks like it for tagging, monks for pulling, and casters/hybrids for the debuff it provides. That was just one item I thought of off the top of my head. Let's see what else:
The same mob has a ring with clicky cold resist buff, and a 2h axe that is awesome against animals, especially full-leveled. The piercer has a very nice ratio, far better than most others until you get to real raid game.
His partner, Icefeather, has a great belt w/ clicky ds on it, and a sword that procs the ds, and a ft shoulder for pure casters.
Sludge has ft boots for casters, a duration 4 chest for healers, and a monk/bst haste belt.
Tidefang has a sword that procs slow, pants with CSI4, a 100% wgt reduc bag (holds giant items!), and a heal inc 4 item for healers.
Lord rags has a very nice knight axe, caster secondary ft item, a nice range item for pet classes, and a really nice chest piece (with mana con3 on it). And for him, you could lock to aa's for awhile.
And I didn't even mention all the bard instrument mods which are so prevalent on adept loots. What you fail to understand, is two things here. One: Veteran players will pause the alt toon to attempt the mob over and over to get the loots they want, especially since many of us leveled right past most of the adept mobs, or they got added after we leveled up (Notus/Nalia for example, are fairly recent compared to the rest). Two: If you make it that much easier to do adepts, then ppl will be even more likely to wait on getting the loots. Varying the timer would be meaningless.
As it is now, these mid-tier adepts only seem to get done when a vet leads a force after some of them, and then usually the second group is random ppl recruited to help. Eliminate the second group, and the random new players are unlikely to ever get a chance at these loots. I guess I'd rather see rarely killed and new people getting a chance at loots, then ultra-killed by twinks for specific phats. It is the same reason I won't support a de-level tool, as people would abuse it to get some of the loots (specifically clickies) they missed while leveling.
Also, I'd really rather the devs spent their time on new zones (of various levels) for people to go to, then work on re-tooling the adepts (again) to be 6-man content.