Probably not much to it, but I wonder if his suicide comment about staying in the bubble had anything to do with Foley leaving. Sure, the brass could've fired him on the spot, and they didn't, but maybe they gave him an ultimatum. It sounds nicer when someone goes out on their own terms, but I'm not 100% convinced this was the case.
Could be, too, that they just decided it was time to move on. I wasn't sure at first if Edzo would stay on, but that seems more likely now that NBC won't have the national/regional coverage anymore. I used to like Judd Sirott doing the Wolves games when I lived there and he'd be a good choice IMO.