Its not as important right now, when the chances of playing with these people are slim, but what about later on, when the games more stable, and maybe even some population drops happen (people don't want to pay, people have too much work or school, etc).
All I know is I've met one of two people using the duty finder, I would like to never play again just in case.
So for later on I'd love like an account blist, or cross server blist.