I think the thing that's most problematic about DA lore is that the mages never seem to have sought any solution to their problems on their own. Like, why did nobody think of trying to solve the nightmares and other threats of being a mage with anything other than becoming Tranquil? Why did no mage attempt to find alternatives to Lyrium? Why did no mage attempt to discover ways to limit or prevent possession? Given these are threats to mages in a very real way, it seems mages in the DA universe are remarkably dense to their own problems and don't seem to have much of a sense of self-preservation. Those basic questions are never answered, and they never will be, because the basic structures setup in the DA universe weren't very well thought through. It's difficult to believe "there's no other solution" to certain problems given mages
literally have the ability to bend reality. It makes no sense that mages had never thought to bend reality in a way that helps them control and make safe their surroundings. It assumes mages are basically ruled by their power, rather than attempting to master it. And maybe that is the central conceit, but if it is it's difficult to believe they wouldn't have wiped one another out long ago.
I think the big problem is Tevinter where the mage abusing their position of power is not a past thing but the current situation and it came about by the relaxation of the rules for Mages, so the Chantry can point to it as an example of what happens when you ease restrictions on mages (though of courses the Chantry is biased as it helps their power to have control of mages and they have absolutely previously rewritten or suppressed past history to suit their agenda like the first inquisitor being an elven mage) And while Tevinter is an example of mages having no restrictions and the abuse that comes with it, it's really less the mages and what happens when anyone has unchecked power over other groups, and there are multiple examples of other groups that end up abusing such power of which Templar's are one. It's why I love Inquisition as it continually asks the question of what happens to different powerful organisations when they grow in power and how there initial purpose can end up twisted and also points out that the same can and is happening to the organisation you build
It still flatly denies the concept of self-governance however, and instead always refers to power consolidation as the only solution. It basically takes the axiom "absolute power corrupts absolutely" to its logical extreme, but the logical extreme of that isn't something that has ever actually existed, and leads to the absurdities presented in the DA universe (and the associated bending over backwards to try and make it all make sense to us, as readers of the text, who can understand it as outsiders, but not really process it because it doesn't actually exist in our reality).
It never takes a more suitable response to power, such as that of Robert Caro: "There's an old saying: 'All power corrupts, and absolute power corrupts absolutely.' The more I've learned, the less I believe it. Power doesn't always corrupt. What power always does is reveal. When a guy gets into a position where he doesn't have to worry anymore, then you see what he wanted to do all along."