Since this really is a rebuilding year, it'd be a great year to keep Whelan and develop him - as long as he can be a serviceable holder for the new kicker, and not a holder like Cory Borkholoviwc or whatever his name was. If Whelan can tackle that job and do it well enough not to fug up Carlson's head, then why not make him your punter? You'd have a booming leg for the next few years on the cheap.
Bet we'll see a lot of Tyler Goodson in pre-season games getting a chance to show he can block.