Francis Scott Key Bridge collapse in Baltimore...

Very true, yet a lot of those northeast of Baltimore folks use the FSK to travel down to 695 then to Rt. 97 or Rt. 2 to 50 and then on over to the Chesapeake Bay Bridge.

The thought is instead of dealing with double the traffic now in Baltimore, the northeast Baltimore folks will just take 95 up to Wilmington and then head down 113. Will it happen? Possibly but who knows. Beach traffic is chaotic any way you slice it......
They really need to do a better job connecting the eastern and western shores. God forbid the Bay bridge got messed up.

Can they add ferries or something like they have in Cape May/Lewes DE?

Ive done that run down 113 to Virginia from Delaware and it's not a bad ride. Would be a horrible ride if everyone and their uncle were all doing it at the same time.