Yes, and in Tiexeira v. County of Alameda.
The only saving grace is the very well written majority opinion arguing that McDonald and Heller ruled that there is a right to bear outside of the home, and the 9th has already ruled that concealed carry is not constitutionally protected in Peruda II. So the only alternative available is to permit open carry outside of the home to all who are not prohibited persons.
Therefore an en banc panel will either have to rule that SCOTUS did not say in McDonald and Heller that to bear outside of the home is a protected right, or else uphold the ruling.
If they do uphold the rule, there is no way that the gun-grabbers will allow Hawaii to push this to the Supreme Court. Imagine the chaos that would occur in the governments of New York, New Jersey, etc., if “shall issue open carry” is the law if the land!