I'll pass along what happened to us when we were there in advance of Hurricane Dorian. I think this is relevant because the hurricane caused park volume to be extremely low at rope drop. We got to the park first thing in the morning, before sunrise. You basically had two lines: One going left, herding into GE, and the other going right at the Starbucks into the rest of the park. Most people (only a couple hundred at most) headed left, toward GE. We were among maybe a dozen people who went right. We walked on to Tower of Terror and Rock N Roller Coaster (it was the only time I've ever seen the fabled 13 minute wait), and no lie, we watched the sun rise from Slinky Dog Dash. We didn't actually get to GE until 11:30 or so, mainly because we had a reservation at Oga's, but also because we had already seen a majority of the park at that point. The wait for Smuggler's Run wasn't bad, and Rise of the Resistance wasn't open yet. The park started to fill up as the day went on, but the lines were never all that long.
All of this is to say that we probably did the right thing avaoiding GE at rope drop, even though that portion of the park would still be nowhere near capacity. By the time we got there, my feeling is that the lines had a chance to die down somewhat, since mostly everyone had moved on to other experiences in HS. I think the crowd size situation will follow a similar pattern when HS reopens.