If the team cuts or encourages to retire Ben, Pouncey, Haden, and McDonald -- that is +$17 million in cap space. Meaning (based on
https://overthecap.com/calculator/pittsburgh-steelers/) they go from -$21 million to +$17 million with just those 4 changes.
Take Haden out of it and it is +$10 million in cap.
I have no idea if those moves are good or bad ideas. Just jumping off Desert Steel's idea that there are some serious business decisions to be made between now and the start of the league year in March.