Re: So why do they do the 2 3 2 format?
Umm... Because of flight plans. Can you imagine how much jet lag players would suffer having a 2-2-1-1-1 series? Those 1-1-1 games would cause extreme tiredness. The Finals is usually one game, rest, second game, rest, third game, etc. It'd be too much flying in a shortened period of time.
What about the regular season? Well, usually flights and schedules are planned accordingly. That's why you more often than not don't see something like:
LAL @ NYK 03/10
NYK @ LAL 03/11
It just wouldn't work too well for the athletes' bodies and mind.