2. What is it with people-who-dislike-Solas's obsession with (incorrectly) categorizing people-who-enjoy-his-character? You're just making yourself look ignorant and petty, because so far these gross generalizations and oversimplifications have been far from accurate. There are plenty of Solas fans who accept that he is flawed. I think you might be falsely equating understanding his flaws with forgiving them.
Yeah, I sadly think this is the major problem we have here. It's a weird, rigid sort of thinking that... doesn't really accomplish anything. Other than trying to discredit people with opinion a person disagrees on the matter. Nobody excuses Solas's flaws, most of the time they simply think that the situation is not as simple as some want to present it and don't over-focus on his flaws, or mistakes, at the expense of everything else... to the point that it affects the perspective on entire story. I mean... Solas is a pivotal character of Dragon Age franchise. His appearance was built up since DAO. Inevitably that means that he'd be at the center of many discussions, or speculations or fan theories. Making him into a straightforward villain therefore limits discussion we can have not just on his own character, but on entire lore and possible story conclusions.
I'm not disagreeing with your point about science at all, but I wanted to point out that magic sort of does require a mage to "suspend their disbelief", as we learn in a banter between Solas and Cassandra. And this is countered by templars and seekers "enforcing reality", or "suspending their suspension of disbelief" 
Yes, but even "reinforcing reality" basically means using magic
I mean, Lucius goes as far as calling Seekers abominations (and we can't say that they aren't especially with their resistance to possession. They're resistant... probably because they're already possessed by Faith?) and Templars use lyrium - the source of all magic, save one mages bring themselves - to do the whole "reinforcing". And mages chug lyrium or use blood (well, lyrium is also technically blood...) to power up their own magic.
I'm also not sure the Seekers or Templars (or mages) technically "suspend the suspension of disbelief" - it's more like they create a situation where their belief/willpower reinforces the reality they believe in (which, in case of Seekers and Templars is totally influenced by teachings of the Chantry), not necessarily one that just IS. So the 'suspension of disbelief' - in universe - relates more to mage or a person changing perspective or giving up/changing what they believe in, which is a separate thing from just ability to use magic, especially in general sense.
Which, you know, is entirely congruous with what Solas tells us, and congruous with reality where there exists a force that lets people do that - in universe that can be shaped by will and imagination, there naturally would exist a law that lets will trump everything/most, including other wills. Naturally then the strongest (or most cunning, I guess) would have the biggest effect on reality OR the most "real" thing would be the one collectively believed in the most (...which I suspect is what powers up the Veil, and MAY or may not be a basis of existence of Thedas itself. The collective will of sentient beings.).
This is probably why Solas himself deems the Veilless world as potentially dangerous and very possibly why Evanuris managed to enslave vast populations. They were fountains of will (additionally powered by slain Titans?) mighty enough to do it.
And maybe enslaving people was also a way to augment their own power? It's not like it's a rare trope in fiction (gods powered by belief of subjects). We do know after all people can draw power from many sources, including other people - this is, in fact, how Inquisitor managed to close the Breach the first time, if allying with mages. Solas literally yells to the mages "Focus on the Herald - let her/his will draw from you!"