We took Uber last week after
HHN, but we opted to walk over to Hard Rock Hotel and grab the Uber from there. We thought it would be easier and less busy to find our car, since so many people were exiting Universal at the same time. But by doing this, we avoided the surcharge and the new pickup area as well. Pretty quick walk from Universal, probably just as far as walking to the roof of the garage where the pick up area is.
One thing we did notice is that for as many people as were leaving on Halloween night after HHN, Uber AND Lyft availability wasn't as high as I thought it would be. We caught surge pricing and there was an estimated 15 minute wait for one before we ordered it. This was around 11:30pm.