A Little Pain with my Pleasure

[Pseudopsia]

Considering the entry requirements for instanced end game content is 45+ and the cap is 50, I would find it hard to believe someone would dlvl 5 times. Spamming a boss (since there has been confirmed to have no time limit in dungeons) over and over with no penalty isn't exactly challenging. That sort of behaviour should definitely be discouraged - and there are no true ways of doing this without offloading some form of penalty.

The fact that instanced dungeons will no longer have a time limit, just makes this an even bigger cakewalk.

When there are harder raids deleveling once will stop the raid because everyone should be equipped with lv 50 gear. Deleveling once you will not be able to equip your best gear and the raid may not meet the DPS check for the boss.