DPS display could easily be solved with a system already in game.

[MythToken]

DPS is just as important as mechanics.
Watch any of the world first t12 or t13 clears and see how close they cut it to enrage, even groups long after the first clears beat those fights as enrage was happening, DPS is very important, the balance is maximising DPS while doing mechanics.
If a job that is meant to be doing damage is not doing damage then they do not belong in the raid.

Dude World firsts are because they are at the bare minimum gear requirements that dps matters. After that its way easier to hit enrages/dps checks.

But again to my point, anyone in a World First raid group, isn't going to lie about their dps numbers to their group, if they could see their own dps. So again seeing only your own dps would still work.