Well, I'll pass on the idea of including a Zero Rotations (one that only affects rotations) in the menu option. Again, should be easy enough to get in there I would imagine.

As for your other question, I think that really depends on the user and their needs at any given moment. Welcome to creating content for a mass audience. It's difficult to gauge what will and won't be useful and how far to go with something. Ideally you would provide what you think is the most needed operations and then hopefully get some feedback from beta testers on other options to include but you will inevitably fall short somehow. I can see arguments for having separate zero operations for all the features you were just asking about.I could also see how limited the use of those things may be on any given day.