[hatsubai]

From ShB onwards, you can now use the Trust system to solo dungeons and MSQ events. I'd be willing to bet they will port this to older dungeons once New Game+ comes out, although I am not sure if they'll ever do this with roulettes.

[falcolas]

Trusts do alleviate a portion of it, but there’s entire swaths of content you can’t do solo (including all of the MSQ-blocking Trials).

I like trusts, but they’re definitely a band-aid for a very specific issue (DPS queue lengths).