the entire premise of veilguard kills me bc it's truly like
ok. it's established early on that the black city holds the blight. every time an archdemon dies, it opens the black city locks a little bit, so there's 2 blights of time left before the whole thing collapses. this was a common theory even before dai and trespasser, bc of foreshadowing in the chant of light, and the sort of obvious question looming over the narrative of "what happens when thedas runs out of archdemons?" thedas is a dark setting, the archdemons didn't seem to be the source of the darkspawn, and clearly the answer was not going to be "yay the blights stop! peace and love on planet thedas :)" but something worse.
then it's revealed in trespasser: ok, solas managed to seal the black city with the blight and the evil elven evanuris, and place the veil around it, back when there was no veil to interfere with magic, and he had his orb and full power. and he no longer has either of those. and in dai, he says he didn't expect being "physically in the fade," to be possible, so presumably going into the fade and then getting to the black city was not ever in his plan. that also makes sense bc corypheus wants to do that too. and if it was that easy, dai would be 5 minutes long, when he just walks back into the breach and retakes the maker's throne or whatever immediately, haha. clearly something besides being physically in the fade is required to reach the black city.
so one can assume that the veil removal is a step in accessing the black city to reseal it, right. that would be logical!! and then with the reveal of the evanuris' lifeforce being tied to the veil, that gets even more reinforced. if they're affected when the archdemons die, then the veil is weakening, and the black city blight is getting closer to being released at the same time. which makes sense as a Cool Clever Plan™️ for solas to have cooked up, to use his enemies to basically power their own cage. which then eventually got undercut by the mortal magisters, that he didn't expect and could not plan for. overall the impression through the games is that the blight and the evanuris were enormous threats that could not be stopped, only contained through these desperate measures. and clearly the evanuris are almost impossible to kill, if even mythal is still kicking around thousands of years after all of the others ganged up on her to murder her.
and then it goes: no actually. solas didn't need to do any of that 6 dimensional chess, reality altering shit to bind all of the evanuris eternally. it's actually fairly easy to kill them! solas put himself into a coma for 5000 years just to avoid a few boss battles, apparently? rook can kill them, but the whole ancient elf rebellion couldn't? and then solas, who couldn't kill them before, and is not actually immortal, and is only one guy, can substitute in for all their energy to keep the veil/black city closed. somehow? even if he just got stabbed? and thedas now exists on a status quo based on putting a guy in eternal solitary confinement using blood magic? yay(?)
very stable situation. SURELY the tevinter magisters will not try to fuck around and find out again, with this even flimsier setup-