Something no one has mentioned yet is the growth rate of children. Kids are only in the 30"-42" height range for 2-3 years. I've got 3 and took them all to Epic a few months ago. The 3 and 5 year old had a blast in Berk, we did Fyre Drill (25 min wait), Untrainable Dragon blew their minds, but neither of them had the patience to wait in line for the other rides which had a height requirement. So it doesn't matter what height requirement you've got, I'm not forcing a 6 year old to wait in line for 90 minutes for a 5 minute experience, when they'd rather watch the ice breathing dragon for 15 minutes. For reference, even at Magic Kingdom if its over 30 minute wait, we skip it and let the kids do something they can actually experience, enjoy, and remember. A day spent eye level with some stranger's butt in a boring concrete que is a horrible memory I don't want my kids to have. I'd actually wager that the parents which do make the decision to wait in line with small children actually walk out less satisfied than average, and are unlikely to come back.
Exploring the land and other walk up items was the highlight of the day, kids under 40" don't care about how many rides they do in a day, as long as they get to do some sort of ride or experience. Ride count doesn't enter into a kids thought process until they are 9-10, and the ride count = value preposition doesn't come into play until you get an appreciation for $ as a mid teenager.
I'm not saying young kids should be ignored in the park planning process, just that nothing in the 42"+ 6-60 age range appeal should be sacrificed for the 30-42" 3-6 age range.