Use case
As an Admin, one of my operators says it can't be upgraded. An action is required, as I will be unable to upgrade to a .y minor release until I fix the problem.
 
Possible Design Solution 
Create a message saying you can upgrade to .z patch releases even when one of your cluster operators says it's not upgradeable.

Ideally, the message string on the condition explains what the admin needs to resolve , and until they resolve the issue they can only update within their current z stream.

 
Questions
Need to do a little R&D to find out when this happens and what happens when you're in this state.

Designs (WIP)
Doc: https://docs.google.com/document/d/1iUZlHbv5nTYtb7Cq4rn_bYPqD4Jtie59xIogxN-2Eyc/edit#heading=h.5eoflxvaj1m4