Yes. What I wanted to point out (and maybe I should stop asking rhetoric questions here) is: he plays only his own game. If he has an interest in keeping the Inquisition and its people save, who knows. Maybe it does not matter to him at all. At least he does not act much upon it, even if it does. He keeps knowledge to himself, possibly also because you must be careful who to trust. If he revealed too much to the (beloved) inquisitor, this might turn out to be a huge mistake later on. I suppose, everybody is a pawn in his "game" and sacrificed or dragged along, whatever the situation demands. I simply do not think that any helpful thing he's done implies any sort of bonding with the inquisition or its followers. He helps them if it helps him, otherwise he does not.
I don't think that's entirely fair. Solas has shown many times that he wants to help people, hopes the Inquisition helps people, approves of the Inquisitor helping people (in fact, he's one of the few companions one who often actively approves of the Inquisitor helping people instead of reactively disapproving if the Inquisitor tells them to go die over there), and he also makes it clear that the whole reason he wanted to power the Orb in the first place was because he wanted to make what he thought was a better world for many people. He even sacrifices his own chance of happiness (being with Lavellan) for what he thinks is the greater good.
At the same time though, Solas seems to believe that wanting to help people and actually helping them are different things. He also seems to recognize that gain requires cost. You can't make big changes if you're not willing to make big sacrifices, and Solas wants to make such a huge change across all Thedas (I assume help the People everywhere, as they're second-class citizens at best pretty much across Thedas) that he feels it will require big sacrifice.
I feel this conversation with Dorian sums it up really well.
- Dorian: Solas, for what it's worth, I'm sorry.
- Dorian: The elven city of Arlathan sounds like a magical place, and for my ancestors to have destroyed it...
- Solas: Dorian... hush.
- Solas: Empires rise and fall. Arlathan was no more "innocent" than your own Tevinter in its time.
- Solas: Your nostalgia for the ancient elves, however romanticized, is pointless.
- Solas: If you wish to make amends for past transgressions, free the slaves of all races who live in Tevinter today.
- Dorian: I... don't know that I can do that.
- Solas: Then how sorry are you?
I don't think he was withholding the information because "Lah-dee-dah, I don't care about these people. They're pawns in my scheme to get the orb back. I know Corypheus is out there with the Orb and a mountain of magic that can flatten this place any instant, but I'm not going to tell these fools because if they die, it's no skin off my back. I can just run off and leave them." He doesn't leave the Inquisition. He helps save and rebuild it.
I stand by my theory that he probably believed that Corypheus had died in the explosion, or was severely weakened, or lost the Orb, or did not have enough power or followers to be a true threat, and was just as surprised as everyone else to learn, "Oh ****, the one that caused the Conclave explosion is back, he has the Orb, and he has a mage / Red Templar army and an Arch-freaking-demon. This is a game-changer!"
Solas makes mistakes. We see it many times in the game. It doesn't mean they're made out of callousness or carelessness.