Even though our fin keel limits where we can sail on the Bay and rules out some marinas, we wouldn't change it. I'd rather be able to plow through most spots where we touch than dig in with a wing keel and be stuck there until whenever.
I like the idea of a keel boat having a center board as well. That would include my little Tartan 27', the Tartan 34 and some 37's as well.
The center board acts as a kind of depth alarm which is easily raised.
The pervasive feature of the Chessy is skinny water so it's best to have a good way of dealing with that.