Currently libpwquality.conf file specifies over 10 different options.
Rate limiting is even harder to set up.
Configuring it in a way that meets NIST SP 800-63-3 requirements is hard or at least non trivial.

It should be possible to set a single variable, specifying the required security level that would guarantee safe operation, in a manner similar to FIPS mode.

this will require ability to measure password's guessing entropy and support from different pam modules to enforce rate limiting