I feel we could hold off on the Skype v Discord chat discussion for now. This thread is for figuring out the general theme, length and execution of the GT, rather than the specifics of events. I agree as well - 6 is too short. Two weeks seems to be a decent middle ground though.
One issue is that any sort of quiz is time-zone specific - not everyone can be on at the same time. I guess one way around it is for people to send the questions on request individually, but I then find that the questions not being publically viewable is a bit... less attractive. (Also, basing the main event on the quizzes means there's a lot ). Quizzes are a neat idea especially given the 20th anniversary deal; I'm just not quite sold yet on making them the main aspect or extending to being a 'champion' any more than other events (e.g. playing old games, creating art, etc).
Personally, we had a number of competitive GTs of late (regioned teams last year, then also the Survivor GT), so I wouldn't mind keeping the competitive elements to individual events this time around.