Since WHMCS is owned by cPanel can't you guys use the same algorithm for password strength? I have 90 set as a value in General Settings -> Minimum User Password Strength and 80 set for password strength in cPanel, and STILL there are passwords that will get through the WHMCS check but be rejected by cPanel.
It's driving users (and me) crazy! I'm going to push the WHMCS setting up to 95 or maybe 100, but with the same ownership of both products you would think matching values on both sid