I believe that the organizing committee at the Waterloo Regionals did a tremendous job with the regional itself.
Although space was small in terms of the pit size, it was sufficient enough (at least for our team). I can understand that the pit sizes were forced because of the limited space available to the event -- But you guys made it work just enough for teams to be able to work.
Traffic in-and-out of the pit area was optimal, or atleast that's my personal opinion.
I couldn't find a single (critical and reasonable) flaw within the regional myself. All the mistakes that were made were by me.
haha dropping my safety glasses under the bleachers
EDIT!: The space for the bleachers were also great. I loved the "balcony" that was above the bleachers, of which again, there were other bleachers.