Interesting that it's not a more common interpretation of Solas that he wants you to stop him.
By the end of trespasser (with a romanced or friendly Inquisitor, at least.) He lays out his plan and what the consequences will be. He says he's been committed this so long he has to continue. Inquisitor has shown him this world is beautiful too, but he's too stuck on his own mistakes vis-a-vis Elf Mortality.
Solas is too sad of a man about his own future actions to give me any impression other than someone who is clinging to a sunk cost.
He knows it isn't right. His time with the Inquisition proved these people are just as alive and worthy of this world as the ancient Elves. He just can't let go. Not when his actions doomed Elves to a life of being overwhelmingly magic-less and second class citizens, as well as mortal. It's too personal, too "his fault" to let go even when he knows it's not the right action anymore.
So he tells his friend, a doomed mortal who stumbled in to being a hero by being at the wrong place at the wrong time and also the person who has been fighting for the sake of Thedas this whole time. He gave us his plan.
Solas wants the Inquisitor after him, so that he doesn't have to give it up, he wants to be stopped. He's an idiot clinging to a sunk cost fallacy, and he can't let go. He needs us to tear him away from it.