If government were to compromise end to end encryption in the manner described above, it would either be visible when used to prosecute people, or invisible because it would never be used to prosecute people (but presumably for intelligence purposes). Even if it were used for intelligence purposes through the method above, which I don't think is at all established, it would still be a significant improvement over having data in a form that is actively used to prosecute people.
The snowden revelations were precisely about information gathering for intelligence purposes. The vast majority of intel gathering is not for prosecutionary purposes.
What is absolutely good is that they have e2ee now, and the only way they could even hypothetically open a back door would be one that was completely secret, for the government, which definitionally closes off a whole class of government use of the data, for example in domestic prosecutions of citizens.
This may not be perfect (it’s not open source etc) but it’s a vast improvement over non encrypted data that was openly routinely given to the government.
I don't know what people expect. These moves are good things and everyone is whatabouting situations that there is 0 evidence has ever happened or would ever happen. It's unfalsifiable, impractical, and honestly just annoying.