Great point, Pete. At Pasa, the renovations completed over the last few years have also opened up a few other small areas, some of which might not be called "tongues" per se, but nearly all of which are pinnable. I'm thinking the way back and way front right of 1, way back right of 4, front right of 9, several parts of 10, very front portion of 16, not to mention the evil back portion of 17. Seems to me the good Doctor did intend these to be pinnable without a doubt. Heck, at the speeds he likely contemplated the greens to be kept at, even that evil front tongue on 5 might be pinnable!
So I do see these as having a functional purpose as well, Mike. Oh sure, they are a bit of artistic flair... but that is surely not the extent of their purpose.
TH