I'm thinking of adding another night to my Universal trip, and taking a night off of WDW. The kids have done WDW before, but never Universal, and we're big HP fans, so I know we will want to spend some time over there and not feel rushed. The kids will be big enough to do some thrill rides, and I'll definitely be doing them too! We want to do wet rides and have pool time. We can't get 3 whole days, but adding a night will add another half day, giving us 2.5 days instead of almost 2 days park time. It means tough choices at WDW, but we can plan our strategy such that we only do the favourites from last time, as well as any thrill rides that our youngest was too short for last time. DH requires 1.5 days at Seaworld, and our last half day is set aside for something non-theme park that DH wants to do.
So, original plan is 1.75 days Universal, 5.5 days WDW. Revised plan would be 2.5 days Universal and 4.5 days WDW, with a possible nip into a park for a couple of hours on another day, so maybe 4.75 days. How does that balance sound for kids aged 7 - 10 who went to WDW at 4 - 7 and have never been to Universal?