Yes agreed - in the morning it really has to be enforced - its not like there is some restaurant that people are coming over for breakfast.
that said...
So I had a very different experience - turned out the employee was wrong.
So at 3:45 I went over to Helios to check out the rooftop bar - and they told me if I entered Helios I could not come back into
epic and had to go to Citiwalk and back to Epic. I told the employee what I know from your comments and she started going off about how they are Loews and not Universal that that is how it is - even if I had a reservation for the bar (I did not that night). I spoke to the concierge desk at Epic and she made a few phone calls and said as long as I had a reservation I was OK. The next night no issues at all - no one stopping people from coming in etc - spoke to the bar manager and she was not happy and went and sorted it out.
One thing she did say was there was a problem with folks coming to the bar and not leaving in time to get back into Epic - but they parked at Epic - so now they cant get back to their car.
I do think they need to figure out something to keep Epic day guests from just using the Helios lobby for a break - some folks have already talked about doing that on their live streams.
First - So I did not stay at Helios so take this with a grain of salt - I also think the park entry wont be enough of the perk overall after taking to quite a few folks who stayed there - I did 5 days of epic so talked to quite a few people at the various bars to waiting in lines etc.. - they really like the hotel and the location cant be better - but for the most part they wont stay again. Basically without express they will stay at one of the other two Epic hotels for Epic. They also did not feel the early entry was all that helpful since all hotels guests get early entry - they would like even an hour or 30 minutes before the main entrance because by the time they get to Nintendo its already packed.
The other thing is - its a PITA to get to Citiwalk so you are sort of trapped at the hotel - and its very pricy.