No I don't expect them to just roll over. I expect either a partnership/alliance of somekind or us putting our scaled foot to their throat and making it clear they are going to help us clean up the mess that THEY made and unleashed on the galaxy.
The only Craftworld with a stated mission to rebuild the Eldar Empire are Ulthwe, most others are just doing whatever the fuck they have to do to keep themselves and the rest of their people alive, and since you apparently don't know your lore that well The Eldar Paths don't even exist at the time of the Collapse, they aren't founded until years/decades pass by Asurman, with his initial students going on to create Paths and Shrines of their own.
Yes we are. By speaking softly and carrying a big stick.
Seriously dude, your looking at the Eldar, taking the worst possible view, and running away with it. Full Stop. Your not considering that many are going to be shocked and confused and regretful after the Collapse, that they aren't shaped by ten thousand years of peril and war from The Orks, The Necrons, The Imperium, Chaos, and all the other dangers of the galaxy, they are People, and as such have just as much capacity to be good as any human does.