Probably would have been quicker to copy and paste/quote yourself than to write an entirely new post explaining it
...especially since I'm going to reply here rather than TTF!
Great review there, I think the key differences between NST's pre show video and the one on Hex is that NST will be new to most people and the 'progress bar' means people can see it is a short video and are therefore more likely to pay attention to it. The crab is only an issue to us enthusiasts who think it looks wrong for the Nemesis creature, not to mention the whole crab in-joke...
I've always felt the ride should have be designed to hold you in the 'cave' before the main show. Clearly if you walk straight into the main room it must have been sat empty for a while before you got there, which means the ride is not operating to maximum capacity. I don't see any reason why this should be the case, so they should build waiting in the cave into the ride experience in some way. It would only have to be minor, like simulating a power loss or something similar to show the situation isn't fully under control.
I'm not sure I agree about overuse of effects, but I don't think I've been on it often enough to know exactly what the full sequence is even meant to be. Clearly there was far too little going on at first, but I'm still not convinced the effects are reliable enough - maybe they need to 'overuse' them to ensure that if one of them fails there are still enough left over to get a good ride out of it. My main issue remains that there isn't enough going on in the lower chamber - flashing lights doesn't really fit IMO.
Getting off the ride is so much better than it was, the old announcement telling you to get out while you were still firmly locked in was a bit rubbish, but the new timer is a lot more dramatic. Aside from that the exit lifts are still pretty much the same as before, but I don't think any major changes were really needed.
As for the maze, I agree that it isn't clear what's meant to be happening. I've never found it in the least bit scary, but I don't know what would have to be changed to improve it. I don't see the actors lasting long given the extremely staff-intensive nature of the attraction, in which case changes will be needed to avoid the ending feeling completely pointless.
As for selling fastrack at the entrance, the less said the better. I've made my views about that known elsewhere and see no need to repeat myself.