I already took two trips to Epic. Lines were long because the attractions kept closing/delaying due to technical and weather issues. They were handing out recovery EP to everyone who was ushered from an attraction, and this added more people to the EP lines. It was common to wait 45 minutes in some express lines. I can't imagine what the wait times for the standby lines were.
Despite all that, I still wouldn't discourage anyone from going to Epic. It's a beautiful park and we are returning next month. I just don't think it's an answer for the folks who are currently upset with Disney's pricing. If they can't afford Disney, they won't be able to afford Epic either.