Likely no. We had a 6:50 reservation showed up a few minutes early and had to wait about 25 minutes to be seated, which sounds like is the norm for wait times there. We were finishing up just as HEA was starting. I wanted to just be able to go sit on the beach to watch so I was bummed to be stuck in the restaurant. This was with them moving rather quickly through the courses too. If you really want to eat at ohana then i would shoot for an earlier time and then you will be back at MK with plenty of time to see HEA. Your other option would be to request a fireworks view table, because not all tables have a view (which is what happened to us) and just watch it from the restaurant. If it is your first time seeing it then watching it in the park is a must because of all the projections.