I'm far from an expert but I actually think this is going to be bad for crypto.
The refusal of major platforms to help enforce sanctions when asked by Western governments is unlikely to go without some sort of response or reprisal and is likely to kick talks of regulation and monitoring into overdrive in every country that's sanctioning Russia.
This war has shown that global sanctions are the world's biggest weapon and anything that represents a bypass of those will be cracked down on.
i think it could be bad for independent crypto, if indeed regulation goes into overdrive when the power of sanctioning those you dont like diminishes (as you say), but it will become increasingly difficult to monitor crypto transactions through time as well. It's a fair point. Plus a broad enough centralised crypto with many signed up partners (e.g. China, Russia,parts of Africa, Brazil, India) will not care about sanctions outwith.
(if anyone wants a conspiracy tangent over a coffee: crypto may become one of the biggest societal controls around if government have the ability to control your spending and your access to money if you're not seen to be behaving as a citizen. China are trying this out. As i say, just conspiracy stuff for now)