If you scored 33 on the ACT would a retake be worth it?

Since it isn’t that much extra work to apply to many UC campuses with just small additions to your application, I would not limit yourself to just two. Many times kids are surprised that they are admitted to a higher ranked campus when they have been turned down by a lower campus. You might have a special activity or hardship that makes you more appealing to admissions despite your GPA. Or maybe your GPA will be a little higher by the end of this year.

33 good enough! :-c