I made a Kentucky Common many years ago, with a sour mash. My impressions of it were:
1) Hey! It's not sour! I should have sour mashed for an extra day or two I guess!?
2) It tastes a lot like an English bitter.
Question for you -- do you think it tastes anything like an English ale??
KC is just a sort of caramelly, malt forward style, IMO. Very pleasant to drink, for sure, sour mash or not. I would do the sour mash again just because it's fun! Even if it's not historically accurate or doesn't make it sour. To be fair, sour mashing is probably safe to use on just about any style under the sun, no need to reserve it for KC style for those of us who have done so thus far.
Great article. Cheers.