I suspect unless they got advance notice from Wikileaks this reaction is too soon.

I'm wondering which of the current top-downloaded FlappyCrush Of Titans clone got caught exfiltrating all their players contact lists or something...

I'm wondering if one route to preventing this being an issue is to prevent any hot code fixes to specific devices. If you have to hot code push to all devices running a specific version, I reckon that would put a damper on the actions of an institution trying to target a specific person. It's a lot harder to try and be sneaky when a change has such a large impact. That said, I'm not sure this restriction alone would be enough.

An interesting theory but I kind of doubt the time between the release and this is enough for them to have identified these exploits.

I agree its a long shot. But perhaps they were on the fence about it and the CIA dump pushed them over the edge. Sadly there is no actual way to know for sure.

They don't like you changing the stated functionality of the app. You're making it sound like an iPhone RCE automatically means jailbreak.