.. Add a mentoring system, add special tokens that you can earn through dailies that involve running low level dungeons with lowbies either with a premade or through the DF.

Each of these dailies award a certain set amount of tokens that you can then use to purchase gear and other items.

Not only would this improve queue times for lower level dungeons it would also promote a more positive and helpful community, and I really do believe strongly in breeding positivity to make it spread .