I like the idea, but I think it will be shot down by the it's used to help new players argument.

I think, however, they could work around this by letting you queue as a party, but only with 3 or less players. They could also add the second restriction that you can only queue with 1 DPS in the party, because let's face it, that's all it's really needed for.

Edit: Forgot to add. This is probably too much effort for what it does, so even if no-one finds flaws with this method it'd probably never happen.