i think we rather need 6-man content again to balance out the issues with queuetimes.

The fact that you need 1 tank and 1 healer to get 2 dps through a dungeon is bad. There just are not enough Tanks or healers q-ing for them.
If you had even 5 or 6 men dungeons you would be much better off.

2-3 player content would, if implemented, definitely need the option to go as 2-3 dps or 2 dps + 1 healer without a tank.
If not i guess the q-times will be even longer for dps rendering that content obsolete.