Question
Is there a way to change the Spam Assassin user preferences required_score quickly, or mass change them all at once?
Answer
While there is no mass change option, you can utilize the cPanel UAPI which allows you to quickly change the values.
uapi --user=user SpamAssassin update_user_preference preference=required_score value=10
For a list of options, please review the UAPI documentation, here. UAPI SpamAssassin update_user_preference