Overall, it was a really interesting patch. I enjoyed the story, although I'll admit it felt like it just arbitrarily ended. I wanted to share some of my thoughts on the Parley and Varis:
The most interesting part of the MSQ patch for me was the Parley, and I wanted to share some of my thoughts about it, specifically as to why Varis likely wasn't possessed by an ascian/mind controlled/whatever during his "crazy" rant. From the way the scene was paced, I think there's good reason to believe Varis was genuine about his whole "create a single race and kill the ascians at the end" plan. The entire conversation was steered by Varis for the majority of it, and the first half actually leads into the second half very well.
The first half of the parley was set up to establish Varis' opinion: "Humanity as a whole is crap, we'll never defeat the ascians, and our differences will always tear us apart". To do this, he needs to establish a key idea: Eorzea is no better than the Garleans, and without the strength of unity (in his case "perfect unity" in a post ascian world) they cannot win. He tries to establish that peace is actually impossible, and that it all relies on murder and war with Nidhogg and the Ishgardians. He tries to establish that building a country is all based on martial strength and conquest, with Limsa Lominsa. He tries to establish that when it comes down to it, anyone will commit atrocities to Win with the "summoning of the twelve" situation. Basically, Varis is trying his hardest to establish that no one in the room is morally superior, and they sure as hell aren't superior in terms of military might. The scene was a lot of fun, although I'll admit the Alliance could have argued a lot better.
The second half of the parley is effectively Varis coming up with an "answer" to the the idea he posed in the first half. If "humanity" is too idiotic, cruel, and greedy to succeed against the Ascians, and by extension the Cosmic powers of Hydalen, Zodiark etc, then we need to fully unite and work together. In his mind, the only way that's going to happen is to remove those "differences" that make humanity weak, combine into one race, and then control the reins of fate. Varis set up the first half to establish why the only possible option is to unify, and then the second half establishing his plan for accomplishing this. Thus, I think it makes sense from a scene-writing perspective.
While the plan is extreme, I don't think it's out of character for what we've established about Varis so far. First, he's supremely arrogant and racist. In the first half of the parley, when Kan-E-Senna suggests comparing himself to a beastman, he's extremely offended by even the thought of it. This is a man who thinks very highly of himself and the Garlean race, and still thinks of the Eorzeans as "ignorant savages". It makes sense that he thinks an extreme solution is best. Next, Varis is very willing to explore unethical options. He sent Regula to secure the power of the Warring Triad, knowing how risky it is to mess with Primal-containing Allagan technology. He willingly endorses using Chemical Weapons despite the inevitable risk to his own troops and civilians, and actively supports using genocide as a method of exterminating primals. He was creating a whole host of Clones (possibly to make some kind of Xande-esque god-emperor) before he learned the truth about Solus. The most telling, and honestly brilliant, move in the Parley of establishing Varis' character is his comparisons to Thordan. Thordan is a man who sought power above all else, believing that the only way to keep his people safe was genocide (of the dragons) and eternal rule with absolute primal power. Thordan was a villain in every sense of the word, and Varis has a positive opinion of him. He admired his strength and willingness to do whatever it takes to win. I think that informs a lot about him.
While he certainly could have been possessed by an Ascian for that part, I think it's more likely that Varis genuinely believes in his insane plan. That said, perhaps we can prove to him that his way won't work, and maybe he'll work with us for a while. Who knows?
Also, tiny tangent on Anymeric's part on the parley.
While it wasn't executed especially well, I actually do believe the whole "Aymeric was just unnerved by the mention of his father" line after the first half. Aymeric is shown to be relatively irrational when it comes to his father. After being presented with irrefutable proof that his father has been hiding the nature of the Dragonsong war, he still decided to risk his life to ask him about it. He clearly had a deep appreciation for his father, and after his death I can see him still getting unnerved when you bring him up. Perhaps deep down he worries he's no better a leader than his father, despite his successes so far.