I'm not sure I follow you. It just comes down to what briefly means, again. Briefly takes care of concealing it again. As far as first carrying in a concealed manner before displaying it, that part is unenforceable because no observer can know for sure when it was displayed. It could have been displayed right before they noticed it. Another curious thing for me is the tension between the words "briefly" and "display". You briefly expose. Display implies willfulness and long duration. Also, the prohibited places section now says you can't open carry in those places either. Very strange.
Regardless, as long as "briefly and" is in there, it will be interpreted as banning true OC. No way around it. The only good thing about the law is that I think striking briefly could be done by amendment to another gun bill at any time during the future session, thus avoiding some negative publicity by the retailers and others.