Bad idea, you'll just do more damage and make things run slower. New OS features aren't just an app that can be turned on or off. They're built into the operating system and linked with lots of other bits and pieces. You'll just be playing Jenga with the system stability.
If you're having issues with the system running slowly, upgrade to an SSD & max the RAM if you haven't already. Otherwise you can disable startup items through System Preferences> Users & Groups. Run volume verifications/repairs through Disk Utility or DiskWarrior. Even shutting down regularly would make a positive difference. Update to the latest version of macOS too.
Actually never update OS... Clean install only is the only best method and trashing apps/everything associated with that app after one use that you no longer need. Trash and empty all files in %home folder%/Logs. etc...
After trashing an app i don't need, i've gotten used to clearing out associated Cache content, Preferences and Application support when most files live. And only install apps you actually use..
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