But if you can't get all 4 days, then it's hit or miss. Some days will sell out much faster than others (as always) so there's a chance when you try to get all 4, it won't work out.
Honestly, it's not very different from last year, because the number of actual 4 day passes was greatly reduced - most people did have to buy individual day passes, but were still locked out of preview night.
I love it, personally, and we always have a really great time! That being said, I also don't spend hours waiting in line for the big halls... too much else to see/do!