The switch doors in xi were interesting. Not something I would like to see repeated. Granted they were kind of cool when you had a group going through them. Yea i will admit it was kind of nifty to work together to get the things open and every body inside.

How ever if you were the only person who had to go behind them you had to brow beat people into dropping what they were doing and come out to help you. Something that i never enjoyed doing.

Now if you are talking about legit puzzles to open some doors then i can dig that. A legit puzzle can be solved quickly by a group or the lone wolf who is lagging behind the pack.