(* I sure as hell would've expected him to step up after Udina's death, at the very least!)
IIRC there's an announcement that all requests meant for the human embassy are rerouted to the asari after the coup attempt, but that just makes things weirder.
Overall that's a very detailed and I think relatively easy to follow explanation. I'd say the time mostly shows in the typos.
I'd have added the themes of self-determination and diversity to the things the ending trashes, since one gets a kicking with Control and both are tossed out the window for the supposedly "best" solution, Synthesis, and also mentioned that it goes both against gameplay and Shepard's characterisation as established over three games to not ask a single question or trying to find a different solution to the ones presented, but I think the general gist of what is wrong with the ending comes across.
The Dark Energy plot outlined by Karpyshyn sounds kinda stupid (humans aren't really all that diverse, genetically speaking...but then, genetics and evolution aren't something that the writers seem to have a firm grasp on anyway) and it certainly goes just as much against Sovereign's claim that the Reapers are beyond human understanding as the ending we got does. At first glance it actually looks as if the stupid "Let's make a deal" sequence has its origin there, in fact.