I wouldn't read too much hoopla into this; it's basically what they've been doing on and off for the last couple years anyway, similar to Wednesday night, and it's non-exclusive so the local teams will still have their broadcasts, unlike on Sundays when it's Disney-only.
The big news here is bad news: no more Memorial Day, Fourth of July and Labor Day telecasts. Phooey on them.
Lou Merloni will most likely make the roster. One of the papers (the Herald, I think) reported during the week that he was practicing throwing to second from behind the plate, and will be the emergency third catcher, as well as a backup infielder.