I wouldn't really mind the upgrade if it were the old-school Rhino. I just hope the old one doesn't get completely tossed aside. Maybe in un-reforming the Sandman (grrr), they can have the Rhino freed of the suit and retired/reformed?
Wishful thinking, I know.
Either way, I always appreciated the Rhino as a heavy-hitting character that was great for challenging low-mid power folks, but not really smart enough with his strength to play in the big leagues.
I also wish this storyline wasn't a transparent method of "New Sinister Six, same as the old Sinister Six!"