That has always been our experience at Soarin' too, which is a pain. We have to park the stroller bring everyone in, go down to Soarin', show the too short kid, and then one of us usually takes the too short kid to Nemo or Figment. Depending on the time of day....sometimes said too short kid and the adult get a snack at Sunshine Seasons because that is easier.
I understand why some people complain about RS, but I think most of the people complaining have never used it. I suppose you can use the extra FP to book two bigger rides or try to get around the tiers (most of the time there are headliners than everyone can do). For instance, we typically book our tier 1 for everyone - ie Frozen Ever After and TSMM. We use FP as much as possible for attractions everyone can experience ie. Frozen Ever After, Peter Pan, etc. We aren't using it to hoard all the FP for 7DMT and FOP. Honestly, in many ways I can't wait for the days when everyone can ride everything together. While it seems like the young families are getting something extra with RS, it takes a lot of time to split up and go through the FP line twice. On those attractions where you may not have FP (you can still get a RS if you go through the regular que), it takes even longer.
I would venture to guess that most people who are not using RS are actually getting more FPs than the young families. My family rarely uses a fourth because we don't last that long in the park. Once we use our 3 FPs and the RS (if we have any) as well as a few character greeting that typically don't have FP, we are usually finished for the day.