They seem pretty useless at the moment. At the very least the spore dive is a big win for them. They can't warp but they now have a ship that can go anywhere, even to alternate universes.
Either they can't or they aren't official starfleet officers also. I dunno. He's pretty strict on regulations.
I'd have found it more believable if the dude had been all about the spore drive -- Where's it at? We need that tech! -- but even then, they have time-travel technology that they're *choosing not to use.* To twiddle your thumbs for 40 years in the vague hope that someone in the distant past will use the same technology you have and show up at your doorstep seems pretty pathetic.