The trouble with requiring everyone to have a fastpass for a rider switch ride is that it means that the kid who is too short (and presumably too young to ride ANY ride alone) can't ever use one of his or her fastpasses.
........ I thought that was the logic behind allowing rider swap without burning a fastpass. Not so much so that families can get extra rides, but so that everyone can use their fastpasses. I understand that there are ways you can game the system a bit and get "extra" rides for older kids, but I'm ok with making things a little easier for families with little ones in tow.
I realize it gets more complicated on the latest and greatest rides (like FOP) but we had no trouble splitting up our FPs so that one parent could use their fastpass to take LO on something appropriate, then both parents could "share" a fastpass and get to ride the bigger rides.
Nothing to do with FP. It started before there was even a FP system. It was so the family staying behind could ride without going through the SB line again when their family had already waited the time. Back then you had the family waiting at the exit to do the child swap.
On the flip side I am currently holding onto a coveted FOP fastpass that I potentially don't need because I'll be getting a rider switch (when we went in 2014 they didn't scan the waiting parents band). And as stated above the younger kids won't get to use their three fastpasses if the adult with them has to use them on a ride they're too short for.
I'm sure they're are some people doing crazy things with rider switch to get "extra fastpasses", but I think most of us just want to make sure we're being fair to our younger kids and the other adult. Last time we went we only used rider switch twice, because the rest of the time we didn't want to have the littlest kid waiting around double the amount of time. I've got a 5 year old who is potentially too short for the 44in rides (and a 2 year old, so we definitely are getting a rider switch), and there is no way he's waiting around while other people do a ride two times in a row that he can't do.
This has nothing to do with FP+ usage, this has to do with the wait time and bringing in someone to ride with you so you are not alone. No one has to wait around as there are plenty of rides to go do without a FP+, I don't know why every discussion seems to forget that you don't need a FP+ to go on a ride. When group A is on 7DMT, take the smaller child to Under the Sea, Dumbo, Barnstormer, Carousel .... When group A is on Big Thunder, take small child to Aladdin Magic Carpet, Country Bear Jamboree, bathroom breaks...... There are ways to make it work for the kids FP+ day of if you feel it's a loss if you don't use them, but not using them doesn't mean your day was a loss.
There are plenty of issues where folks will feel they aren't getting their "ticket's monies worth". Haven't been on SM in years because they won't give DS a Rider/Child Swap because he's tall enough, lots of older folks can only watch shows where no FP+ is needed, many in wheelchairs can't go on most rides and only attractions where FP+ is not needed ... many unused FP+.
And I completely disagree that most don't try to double their passes, it is discussed here with regularity and how to do it, enough so there are jokes about rent a baby. Because it impacts the very most popular rides, it is likely to be something Disney addresses.