I've been thinking about why some people have such an extreme dislike for the coin system while others, like myself, have no problems. I have a couple of theories, but one of them, I think, involves how you play.
I play RBB in a manner that I will call "for fun". "Playing for fun", in this context, involves playing without regard to leaderboards. Yes, I got a fun charge up my spine the one time I beat someone on my friends list (either my Friends are all spectacular, I suck hard at this, or some combination thereof)... but that's not why I play. RBB has become my way of enjoying Rock Band either (a) when my wife/kids are asleep, and I can't RAWK OUT without waking them, or (b) to play those songs that I don't like on or are frustrating in my favorite instruments (bass and vocals). Much of my time has been spent "rediscovering" old tracks that have gone untouched in Rock Band while clearing out the Facebook goals.
If I were to play a track competitively, I would probably do so with only one powerup (Bandmate or Jackpot) to figure out HOW I want to compete, and then make decisions accordingly. I view it in a manner similar to path optimization in Rock Band.
In many ways, I think the difference between "For Fun" vs "Competitively" is how often you repeat a track. I have, in the near-week this game has been out, only repeated a track twice by the time I'd hit the "you've played 50 tracks) achievement. I would imagine someone playing competitively would have repeated tracks much, MUCH more often.
I'm not advocating one style of play over another. I am curious, though, how many people play here for one reason vs. the other...