My suggestion would be to offer a LFG tool for conveience. But, to also offer some sort of bonus for making a premade group and actually walking up to the entrance to do the dungeon. I mean, gather 3 other players (not companions) and actually go there. Maybe you will get 10% more credits to drop or possible even a crafting doo-dad at the end.
I agree with this. I think the option to queue for dungeons should be available. Options are important. But with that said; I think people that choose to go "the extra mile" should be rewarded. It also rewards players for forming their own groups, and keeps the world a little more active. If a LFD system was added, I don't think you should earn social points in those groups. Maybe that stays reserved for pre-made groups.