With a ride like you proposed, it would still limit little kids. Sure, you could control if your vehicle goes upside down or not, but what would the restraints for that ride be like? Think about it, if you have the potential to flip around, the manufacturers have to assume you will, even if youre the tamest rider out there. With restrictve restraints comes a restrictive height requirement. So, no, this wouldnt be a family ride, it would still have a height requirement "just in case".
You all have to realize that everything Universal does doesnt cater explicitly to us. There are no five-year-olds on this board (I assume) who can speak up and tell us that a few playgrounds and Seuss Landing aren't enough to make a full day of fun for them. Sure, we all love big rides but its selfish of us to assume we should be able to ride everything, and we aren't the demographic Universal is catering to with this expansion. Lets not let this spinning/flipping self-control spinner ride become the next DC land.........