My guess is Riley doesn't mind at all that he's gone. A rebuild is underway in Miami. It was going to be a messy break-up no matter when it occurred. I'm sure Wade expects to be a max guy until he retires, and I'm guessing he's not retiring any time soon.
According to an article I read (I think on ESPN.com) the difference between Miami's offer and Chicago's offer was about 6 million total, which turns out to be about the same offer when you factor in no income tax in Florida, so this goes beyond money for Wade. Chicago seems like a bad fit to me, you already have a younger version of Wade in Butler and between Rondo, Butler & Wade you don't really have a decent 3 point shooter in the bunch.