The event is selling out, as do most night time events at the theme parks nowadays, so I doubt Movie World are really concerned about feedback at this stage. Unfortunately I'm still locked out of the state until later this month, but speaking to some friends they said the event was 'something'. They were huge fans of Hurray for Hollywood so do with that what you will.
I tend to agree with this beyond what they mention. I wish our parks were open later but it does hit a point where the excitement just runs out. Movie World's biggest downfall is a lack of people eaters that you can just vibe on for some time. Wild West falls is probably the best example followed by Justice League, but it'd be nice if there were just some more slow moving attractions that you could enjoy between the intense experiences. Working against them is limited space, but with Arkham on its way out I'd love to see a cohesively themed location with some more family friendly additions.
Honestly in that area you could go back to basics with a 'Village Studios' themed area. Have a tram tour that goes through the studios as something a little more dynamic, have a successor to the Looney Tunes boat ride with a slow moving Space Jam ride, and then have some things like a Studio Observation Ferris Wheel, etc. Movie World has some great attractions but they are let down by little to do in between and if you do them over and over you just end up sick.