The important part of "bikeshedding" is the part about ignoring more important changes by focusing on trivial changes around the edges. If stories are more than trivial, I'd like to know how.
Personally, I think call quality and server reliability with respect to private messages are more important for a service that is explicitly (and, until this change, exclusively) about private messaging, especially considering recent outages.
If Signal changed the encryption protocol to an insecure one, or simply removed it, then they are fundamentally altering the promise of the app vis a vis its core technology, ie, the essence of the provided service. Obviously that is analogous to the foundation of a house, not to the shed in the backyard.
Personally, I think call quality and server reliability with respect to private messages are more important for a service that is explicitly (and, until this change, exclusively) about private messaging, especially considering recent outages.
If Signal changed the encryption protocol to an insecure one, or simply removed it, then they are fundamentally altering the promise of the app vis a vis its core technology, ie, the essence of the provided service. Obviously that is analogous to the foundation of a house, not to the shed in the backyard.