More content... Okay what's the lone Crop Rotation for? Finding a Orchard when you have Oath out or fetching that Wasteland/Strip Mine? Seems kinda of jankey to me.
I've played Crop Rotation in my Oath deck for quite a while, and I find it works very well. I play a version with more of a "combo" flavor, running 2 Muddle the Mixtures that I can transmute into Oath, Time Walk, Echoing Truth, Demonic Tutor, or Mana Drain. This gives me myriad ways of finding Oath fast. However, it can be frustrating to sit there with Oath on the board, and not being able to find a Forbidden Orchard. Crop Rotation solves that.
Also, as you mentioned, you can rotate into Strip Mine if an opportunity to mana-screw your opponent arises. While these don't seem to be enough reasons for you, you appear to have neglected to notice that Crop Rotation also protects
you from Strip Mine and Wasteland. There have been several occasions where my opponent has Wastelanded my Forbidden Orchard, and I've responded by Crop Rotating the Forbidden Orchard into another Forbidden Orchard. It's quite useful as a one-of.