Having a Will-type of friend who comes from a mighty family as well, I can say that even wealthy spoiled kids do grow up and mature over a decade or two. I've known a 16-year-old once, who would react the same as Will in many situations, like swinging his daddy's credit card every time he felt pushed into corner.
But twenty years later I see a great, handsome guy now, who's turned from d*** to DILF, with husband, kids and home to prove. I know Will will get there one day and the tantrums will be just a funny memory.
As for JJ... oh, boy, it was time to see him mellow. But if Alex messes up, we'll go Henry VIII on him.