I said it when you announced the contingency and I still think it's true. You should have fixed the AI rebellion instead of replacing it. Calling the contingency a fix for the AI rebellion is asinine. You yourself just said it's not a rework but a replacement, replacing something is not fixing it. We don't even have the option of sticking to an old version of the game like I normally would in these situations as you have never had a working version of the AI rebellion.
The original AI crisis' design goals was to be one of three endgame crises, triggered by synthetic pops, spawning an AI entity that tries to wipe out all organic empires.
The Contingency's design goals is to be one of three endgame crises, triggered by synthetic pops, spawning an AI entity that tries to wipe out all organic empires.
The design goals for the AI crisis really didn't work with the idea of just being rebelling synths as it makes no sense for a handful of rebelling synths to be a threat on a galactic level, which is why it never really worked. To fix this, it was reworked into the Contingency, a different spin on an AI crisis that can actually meet the design goals that the AI crisis was supposed to meet in the first place.
The machine uprising has completely different design goals and is not in any shape or form similar to the old AI crisis besides involving robots (not even just synths) rising up against their masters. The only similiaries between it and the old AI crisis is thematically. You seem extremely hung up on the themes to the point where you are completely ignoring all actual game mechanics.