As someone who's been "spoiled" by going to HHN for so many years, the biggest problem I had with Howl O Scream Orlando was the lack of signs and how crazy the place was. I maybe go to Sea World every 3 years or so, so I have no internal map of the park layout in my head. You come into the park from some weird side entry and there's the first house with a huge line, so we decided to jump ahead a house or two to get in front of the rush. Had no idea where to go! Asked a couple people and just pointed in general directions. Then you had to walk into part of a stadium and do a semicircle and come out somewhere else. Did a house and got spit out somewhere totally different.
Trying to find the 4th house (everybody referred to them as 1st, 2nd, 3rd, etc) we somehow found our way our way to the 4th house yet somehow missed the corresponding scarezones. No indication of the house or anything from the thoroughfare, but saw the sign after we walked past the house so went back to check it out.
The circle of Universal Studios is soooo nice for events like this. In the past they've had a couple houses that went in by Kidszone and spit you out by MIB (or maybe vice versa, memory isn't so good) but while that was confusing, the lagoon in the middle allowed you to quickly orient yourself (or at worse you had a 50/50 shot of going the right direction since there's a single path).
Seaworld needs to have better/more signs for the houses, shows, and zones. It was too hard to find stuff when we only went one night, after dark, with no daytime map stored in our head. At one point, we walked down this big long walkway seeing people coming from that direction so figured there was something down there...only to come to a roped off dead end that seemed like it could/should have been blocked off much earlier to save everybody from walking down there.
The app with the map was so spotty that it wasn't much help at all and the GPS on it wasn't very accurate. We'd look where we were, start walking, then it would completely change us to a parallel path or something.
HoS Williamsburg was even worse as the ENTIRE park is open, with even less signs, and pathways through the woods that are obstructed by closed rides so you can't see the path until you walk to what looks like a dead end from a distance. Having all of Seaworld open, but with only a handful of rides, houses, zones and themed bars seems like it would be a similar nightmare.
Having said all that, we thoroughly enjoyed the event and took advantage of the 2 for $66.66 deal to do it again this year...but hoping for more sineage directing you to houses and something like HHN where there's a clear sign/portal/entry point for the queue so you aren't left guessing if there's not a line long enough for you to see it from the pathways.