Yes, the FDIC is omnipotent only in its own mind.
It's theoretically possible that the other regulators will say it represents a "best practice." However, my guess is they will damn it with no praise at all. Think about it, if they supported it they would have made it a joint issuance...
Related thread.
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.