Just curious, why is it so high? It doesn't really throw you around and the spinning isn't that intense. I have only ever ridden it once and I didn't find it that interesting so maybe I am just remembering it wrong?
You remembered correctly.
Maybe it's just me, but Primeval Whirl is the least 'Disney' ride at Disney, particularly it's location.
In the middle of a carnival atmosphere is one of the two rides with the tallest height requirement (Rockin' Coaster being the other 48" requirement).
Little children can walk by and ask, "Look Mommy/Daddy/Adult, it makes silly noises, it's not a roller coaster, why can't I go on it?"
My daughter was finally tall enough to ride and agreed, "One & done!"
Similarly, after taking my daughter to go-carts where she can actually steer the vehicle and pass other go-carts, we never have to go on Tomorrowland Speedway ever again.
Here's what I'm getting at - regardless of height requirement, Primeval Whirl is a waste of time unless you have time to waste waiting for the Nemo show or your Dinosaur FP+ to become active.