In the costume descriptions there are a couple one things that was left off.
First, the costumes will change in Kings Cross with those TMs on the muggle side of the wall wearing one version and those on the 9 3/4 side wearing a wizarding variation.
Also, there are going to be TMs (who I'm guessing will be stationed in the "transition" areas where guests move from London into Diagon who will have unique costumes that are reminiscent of the clothes you see the Weezleys wearing in the movies (green tweedy looking stuff).
There will be two "special" hats worn by female TMs in Knockturn Alley that will be really unique and only one of each style will be worn at any time so guests will have to spot them in the crowd.
Overall from what I saw of it, it will be above and beyond all of Hogsmeade's stuff and exceed everyone's expectations.