Too many people to quote a reply at, however—

Suggesting that "no one will queue for MSQ" is simply inaccurate (as in, you have no way of proving this statement). At any point after this change, the non-new players queuing will be greater than 0 (it is far more likely than not that this statement holds).

In accordance with the above, putting myself in the shoes of a new player, I would rather wait a longer time for these dungeons, if a shorter time means getting yelled at to skip skip skip. S-E, apparently, agrees.

Refitting the Leveling Roulette to accommodate for 8 player dungeons is very, very simple. It is not this enormous undertaking that has been suggested.