I agree with you, I thought the 'You're next' actors were dreadful compared to the roaming actors in previous years! The only time I noticed the roaming actors were good was when Cabin in the woods was down so all the actors from there were all in Amity Cove.
It would be nice to see some themeing around the park, although it wasn't 'scary' I thought the lights on Stealth and the trucks in Amity Cover with flashing lights and smoke in were quite cool. I thought that the audio on all of the rides were quite good, I liked how it was the same sort of theme on all of them, the director speaking. It would be nice to have some better queueline audio and other audio while the director isn't speaking though to create a better atmosphere.
It still states on there website that they recommend that people must be over the age of 13 to go in the mazes so I don't think it will affect the mazes at all. The Blair which project was a lot tamer than the others so that could be used for family's I guess?
With the whole push on the family market, I couldn't imagine there being really scary roaming actors this year, I can only see them doing similar to last year which is a shame.