Re: shoal draft keel vs regular keel
Nothing wrong with any of the keel designs, again, it's a matter of "what is best for your waters." Lots of people get away with wing keel designs all the way up to 60 footers, again for shallow water haunts (Chessie, and Keys a good example).
One keel design not mentioned, is FULL keel. I'd argue there is nothing more seaworthy than a FULL keel (and the draft is usually acceptable), however you're still not likely to point as well as a fin with one.