Isn't this class trinity a bit dated now?

[MicahZerrshia]

To be fair when they do try to shake things up a little look at the way people flip out.

Example:

Tank: "Hey healer, instead of standing there can you throw some dots on the mobs"

Healer: "OMG ITS NOT MY JOB IM A HEALER NOT A DPS I PLAY MY WAY YOU DONT PAY MY SUB RAAAAAAAAAAAAAAGE"

I would give more examples but I think this is the most common one people are familiar with. So sticking with the trinity just keeps the peace