We've gotten a TP subscription and used custom plans each time we've gone. They've always been pretty close. The thing I'm seeing now with the crowd calendar is that the times look fairly busy - like 5-7 range, yet there have been good dining reservations available for months, and they're still available now right before we're going. I'm talking about character dining and stuff like that, and at normal eating times. We usually have gone in February-March, and once in late September, and I always had a really hard time getting good dining reservations even when crowd estimates were in the 3-7 range. Maybe it was just free dining promos affecting it or Disney staffing differently? When we've gone before the restaurants were full, so I don't see how it could be different staffing.
I've also noticed that on a day that's supposed to have higher crowds in a park vs. a day with slightly lower crowds, often enough the day with a lower predicted crowd level has no good/character dining reservations left and the park with the higher predicted crowd does have good reservations left.
I'm curious what our May trip will be like compared to Feb-March (including one fairly busy March), and September (which seemed just as busy as a busy March trip when we were there).