And now, I will address what you said about
I just hate it when poetics geared tanks do single or double pulls. It's extremely boring.
That was a statement psoted as example. An overgeared tank should not be single-pulling, period. Even if the healer at the exact gear level to queue in; the tank's overgearing makes double and triple pulls easy to heal through. The healer may not be able to DPS, but the run will go faster with multipulls.
It's boring, but I don't get frustrated when a new or low-geared tank does small pulls; but even an at-ilvl tank can do most double-pulls with general ease.
Dungeon content is very, very loosely tuned. You can get through it with doublepulls with a tank that spams flash and doenst use cooldowns, a healer who spams heals into the tank, and DPS who spam their 1 on mobs - as long as boss mechanics are handled properly.

There is no feasible excuse for doing single-pulls in a level 50 dugneon.