A multi launch spinning coaster with changing show scenes in a themed forest isnt "just a kiddie coaster", especially when its being lead by Greg Hall, its just not a kiddie coaster at all, pretty much everyone who rides is going to get something from this. I'm not saying this is an E ticket offering, but lets give it the credit it deserves, it's gonna be able to do around 1300/hr.
Universal are doing a great job with filling the gaps with gateway drug rollercoasters in this park, that adults can love too. Hagrids started that stepping stone effect with being thrilling but slightly less scary for younger kids than your bog standard thrill coaster. This one and the dragons coaster are easily gonna sit one step under that for the younger kids. And the park needed more roller coasters, because shockingly, people love roller coasters of all varieties. Shows are expensive and the theatre they had planned would have only served about 500 people (maybe even less). even if they ran 2 shows an hour (unlikely) thats still only 1000/hr