Thanks for taking the time to explain all of this to us. I appreciate the effort to clear the waters.Ok, trying to catch up, and if I miss something, please bring my attention to it.
Third party standing: the Order addresses this. Caselaw has developed since 1923. Plus, the universities are arguing direct harm because of actions taken toward specific individuals. It is not limited to an abstract "We might want someone someday" (like the employers appear to be arguing). Rather, it is specific, concrete harm that they are alleging. Also, developments in the 1960s allowed universities to have standing on behalf of their students.
Word count/en banc: in big cases it is common to request, and receive, permission to exceed the limits. I think I only had to do that one time, and it was a REALLY big case. Similarly, big cases will usually get en banc (the entire court would review) rehearing. It is unusual for a member of the panel to ask for it (which is what "sua sponte" means), but it makes sense in something like this that involves other branches of government.
Section 1182 discretion: again, this is nuanced. The issue isn't whether the executive has discretion to take the action. The issue is better framed in terms of whether the discretion was executed consistent with the constitution and other laws. The POTUS is still subject to legal requirements, even in areas that he otherwise has discretion. About the only place this doesn't apply is pardons/commutations. Even then, he does have to do certain things, like put them in writing. Otherwise, his execution of laws has to be consistent with laws and constitutional principles.
How many INGOers who are complaining about the 9th circuit opinion have read it?