This one is a close call for sure. My thought is, it's a solo, but the height off the ground of a fall from any point on the climb is unlikely to kill the climber. A climber is on the summit after what, 20 feet of fifth class? That would be "R" without question except that the landing isn't flat, it's rocky.
Plus the so-so cam might hold a fall (but we should assume it's essentially a solo).
Another factor in my mind is the total lack of surprise. A climber can see the whole route from very close up. The risk is totally obvious, so, in a way, the "R" and/or "X" aren't so much needed or valuable as in a longer or less easily visible route.
I'm open to suggestions from others. So far I lean toward "R," I think you lean toward "X," and we know Mr. Mud votes for "R-" (don't bother commenting Mr. Mud, your vote is preordained

).