I would have to voice my opinion against that feature. Take WoW into account. it died with the addition of the dungeon finder due to the fact that you had to put even more effort into getting a solid group together to run some of the harder instances.
(yes i know many things killed WoW, not trying to open up a flame war about non sense)
but the biggest impact towards “hardcore” players leaving the game was the dungeon finder. My suggestion to you is to just be sociable for a while at the times that you play and add friends to your list. soon you’ll have plenty of people to gather up and go raid dungeons.