The trinity, party responsibility, and how to try and improve the game from within

[DPZ2]

The problem lies in the core of the system in my opinion, and you'd need to rework it entirely ...

Reworking the game entirely to mitigate or eliminate Tank/Healer/DPS would mean writing a new game with a different feel to it. To this point I have not seen a successful reworking of the Trinity that still felt like an MMO. Anytime you have an instance/encounter where damage needs to be either mitigated or healed, you invoke the Trinity.

There are nice systems that allow you to change your part in that triangle by using different weapons (GW2), but game designers always appear to think world encounters should be punishing engagements where death is always one failed heal away.

I haven't encountered any persistent world FPS yet, so maybe that genre would fit the bill.