Depends on your goals. My wife's #1 favourite thing at WDW is Fantasmic! For us, going to DHS on a day that we have to leave by 6, doesn't work. Yes, if you're only focused on hitting the rides, then you'll hit more rides with lower crowds then larger crowds. But if you want to see the nighttime shows (Fantasmic!, HEA, whatever they're calling the thing that replaced Illuminations..., etc...) then planning a short change day at that park means you'll miss out out those. If we have PH, then we can hit DHS in the morning, then hop over to another park to see that parks nighttime show. Or, if we had large number of park days, and were planning on double hitting that park, then sure. But if that was my only day in that park, that means there's nighttime entertainment I'm missing out on by having to leave early.