precisely what Matrix developers are advertising Matrix to be

Idk what stuff you’re reading, but every dev talk I’ve seen includes many acknowledgments of the shortcomings that still exist and the difficulty of the underlying problems. I never had the impression that they’re trying to sell a silver bullet that’ll fix everything once and for all. It’s mostly just incremental changes here and there that fix or improve certain parts of the system, and with that a steady progress towards the goal.

Arathorn telling everyone that everything is fine

I wouldn’t give too much on the speculations and opinions of any one person, even if he’s the Matrix project lead. Probably especially the project lead, because part of his job is being optimistic about changes so they actually happen. But this is still mostly uncharted territory, and all anyone can do is make best effort attempts to improve things bit by bit. And from what I’ve seen he also openly talks about issues and the limits of coming changes, so perhaps you just read too much into his more optimistic posts and comments?

Personally I’m just excited for new developments, but also aware that any change has to prove itself in the field before it can be declared a solution for anything.