Given that this would be useful for other tools, perhaps it's best to create an "openssl-insecure" package which would ship a version of openssl that has all the bells-and-whistles enabled (including the insecure ones). We would have to take care that nothing is unintentionally linked to the library. It would be a useful companion to software like testssl.sh (which has similar requirements to sslscan)
I certainly don't have strong feelings about this, especially given that I haven't done any of the work... Just a thought :)