So I read in a comment on another Disney blog from someone claiming that a rider swap pass can be used like a MEP to accelerate LLs.
So for example, me, my friend, and my toddler would show up to Big Thunder Mountain to get a rider swap. I would wait in line, and she would get a rider swap pass on her phone and wait with the toddler. But instead of her then riding the ride, we could go to Smuggler's Run, she would wait in that standby line, and I would get a rider swap pass on my phone. (I'm ignoring anything about Tiers just because I don't know off the top of my head what is Gold vs Silver and we were each already planning on doing BTMRR/Smuggler's solo). Then with both of us holding rider swap passes, we could book LLs for yet another attraction and accelerate them forward the same as if we had an MEP, as long as we don't go on Big Thunder or Smuggler's (respectively).
This sounds less efficient than fishing for MEPs but more of a sure thing. Can anyone confirm if this is possible? I'm not sure we would even take advantage of it but it is interesting to think about the possibilities...