Interesting points, but I'm not sure I agree with your last sentence. Clearly, users of the Rebuilds are going to be impacted and part of that impact is their workflow. They may have to switch distros or do some other juggling to continue forward.
One other thing I want to add: I've read a bunch of comments about how the Rebuilds were used in educational and scientific settings, and that there is a prohibitive cost for RHEL in those environments. After reading so many comments about it, I have to believe that Red Hat is going to make some modification to their Developer License program to allow more than 16 'seats' for those use cases.
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