But, if they weren't enforcing the FP requirement on the second group when the first group used FP, then families with two adults and two kids could translate the beginning 3 FPP's into 6 FPP rides for each adult and 9 for each child. Dad and ChildA gets FPP's for three rides 1, 2 and 3. Mom and ChildB get a totally different three FPP's for rides 4, 5 and 6.
Dad and ChildA ride #1 using FPP and then Mom and *both* kids ride it using Child Swap.
When you repeat that for each ride, they'll have never waited in a standby line and done 6 FPP attractions with each kid getting two rides on half of them. Even if they had the rule, but didn't enforce it, it wasn't a rule. So, I am all for any changes.