Certificate Transparency is to detect compromised or malicious CAs, and typically only lets people know about problems after the fact. How would OCSP help with

Certificate Transparency is to detect compromised or malicious CAs, and typically only lets people know about problems after the fact. How would OCSP help with a self-signed certificate? What CA would the OSCP request go to? And cert pinning only works if you've visited the site before while not being MitMed. A lot of these extensions to TLS help secure popular sites like Google, but they don't scale to the many small-but-important sites such as your local credit union. Instead of adding so much complexity, it's much easier and safer to keep current behavior and warn on self-signed certs.