This is my opinion but I think maybe making mob respawns independent of each-other would go a long way to alleviate the link system.
as it stands now, every 2 minutes all mobs respawn if dead. So that means that if a mob you killed 30 seconds ago is at the end of that 2 min window, it will respawn very quickly. This is a huge problem with the plack of AOE and early crowd control. How many times has this happened to you:
Fighting a pack of 8 mobs you down 5 with ease but the last 3 are proving a little more difficult (because of timers or low damage output) and all of a sudden those 5 mobs you killed are all at once back on you?
If a mob that you killed 30 seconds ago will respawn in 2 min from the time of defeat I think it would lead to more positive gameplay. It will allow players to progress through w/o worry of mass respawn to wipe their PT.
With independent respawns, you will still have the challenge of taking on 8 mobs at once, it's just their respawn will be staggered upon time of defeat. Example
(time to kill are factitious to keep in a 120 second respawn window)
If you have mob A B C D E F G & H fighting at once.
Mob A dies in 30 sec (2:00 timer starts)
Mob B dies 15 sec later (2:00timer starts, time for mob A pop 1:45)
Mob C dies 20 sec after that (2:00; A 1:25; B 1:40)
Mob D dies 20 sec later (2:00, A 1:05; B 1:20 C: 1:40)
Mob E dies 15 sec later (2:00; A :50; B 1:05; C 1:25; D 1:45)
Mob F dies 20 sec later (2:00; A :30; B :45; C 1:05; D 1:25; E 1:40)
****UNDER CURRENT CONDITIONS MOBS ABCDE ALL RESPAWN NOW!****
Mob G dies 15 sec later (2:00; A :15; B :30; C :50; D 1:10; E 1:25; F 1:45)
Mob H dies 15 sec later (2:00; B :15; C 35; D :55; E 1:10; F 1:30 G 1:45)
--- MOB A RESPAWNS NOW (under independent spawn timer) ---
With the lack of constant AOE or crowd control taking on 8 mobs (even at high levels) is a significant challenge. Fights dont even go as quickly as what i've described above currently. Depending on set up with current classes maybe we would get through ~5 mobs before respawn.
The difficulty is made even more apparent pre level 40.