... Can you imagine how blind-sighted people who didn't play DAI will be? I have my doubts that we'd be building the same kind of relationship with him throughout DA4 (assuming it will be focused on Solas, though I don't see the reason why it shouldn't) - heck, it's pretty much impossible. The wolf's out of the sheep's skin.
Now we can only move forward, with the threat to the world Solas poses - and I suspect Bioware will do little to dissuade people from thinking that he's a relatively straightforward threat to fight... and if they do, it will not happen in an overt kind of way. This series seems to be all about nuance and additional information - heck, some of it is even in additional materials, or comics, or books or in past games. They aren't shy of making us dig for information. It adds to replayability and sells all the additional stuff, so it's actually not that silly of a strategy, even from financial perspective 
Somewhat unrelated but - Oh my god, I'd love some expanded universe stuff on Solas. I haven't felt much interest in any of the EU material, but I'd love to get my hands on any theoretical comic or novel about Pre-Veil Solas, when he was leading his rebellion or just coming into it. It'd be fascinating to see how he's changed, how he hasn't, just... unf. Please. Please BioWare. Fenris gets a novel! Alistair got three comic books! Cassandra got an entire anime! And none of them had backstories as deep or interesting as Solas!
The unexpected anomaly seems to be Solas himself
He IS supposed to be the antagonist of the next game. We aren't supposed to feel TOO sympathetic - it would miss the point if we sympathized with Solas outright, or didn't intend to stop him 
I also don't see us as unexpected anomalies - unless we're as unexpected anomalies as people who actually finish the game. Most people don't even do that. If I remember statistics correctly 20-30% reach the endgame, and that's not just massive RPGs, with the rate of those reaching the finish line being even lower. Majority of people then don't even bother to sink their teeth in the story, much less think about nuances of it. I assume therefore that the rate of those who kill Solas in DA4 (5?) will be much higher than those who'd save him... At least at first?
Eeeehhhh, I imagine any conclusion with Solas will be buried deep in whatever game deals with it. So anyone who didn't care for the probably will drop out before they get to that point.
My main fear about being the odd ones out on liking Solas, though, is that... well, sometimes I think BioWare listens a little too well to their fans, to the point where they'll tailor the game to majority opinion... without much regard for the minority. I mean, look at Mass Effect. Tali and Garrus get brought back as romances because of their massive fan popularity. The Jacob romance gets an abrupt, unsatisfying end because most people didn't bother with it and didn't care for him. And say what you want but I still feel like we would've had a chance for a happy ending to the Thane romance if he weren't so surpassed by Garrus in popularity (Me? BItter? What could ever make you say that?
)
I can't help but think that's one of the reasons everyone in game seemed to universally disapprove of what Anders did. Granted, reception to Solas seems to be more nuanced and positive than it was for Anders.
Yeah, sadly that's the thing - there are people... dunno how many of them there are, but they can be very vocal, who'd just deem him villain without ever looking at his motivations, just because he can't be easily categorized. Thinking in black-and-white categories is just so much simpler...
I mean, many people apparently wanted to lop his head off after post-credit reveal, when we didn't yet know his full motivations with any sort of certainty (though Trespasser basically confirmed what I thought is happening), but simply for lying to the player about the whole ancient elfy/Dread Wolf thing. If they wanted to punish him for that, then there's no wonder that they compare him to Hitler and the plague.
Though some of us do suspect that it has more to do with the wounded player's ego - he hid his motives and alias, he infiltrated Inquisition (though ironically that actually saved the South from the Qunari invasion) and basically played us like a pawn on a chess-board. So I suspect a lot of people want him dead not because they're motivated by concern for Thedas, but because Solas slighted them.
Yeah, I hear that. People accuse me of being some blind fangirl who can't see past her rose-tinted glasses, when some of the things his haters say make me go "And people think I'm the one with the problem?" How can you pull up so much hatred for a fictional character? I may get a little weird about Solas, but at least I don't share fantasies of brutally torturing and murdering him on a public forum. That just - can't be healthy.
I just don't understand it. I thought it was really cool, how extensively and expertly he manipulates you! Like, okay, yeah, probably not the hallmark of a great friend - but jeez, it's something you just have to sit back and appreciate in it's ingenuity. He managed to keep his identity from a Ben-Hassrath, an expert Game player, and one of the foremost spymasters in Thedas. For months - years maybe. And apparently he was running a decently extensive spy network all the while that's just - dude. It's incredible. And... kinda hot.
Is my evil genius fetish showing yet?