My unnecessary $.02 is that, as a shorter rider (5'6"), a smaller wheelbase makes an observable difference in how I am able to skate. I'm just coming off this 8.38" DLX deck with a 14.5" wheelbase, and it was a great board, but the thing felt completely unwieldy to get off of the ground. Now I'm on a Loveseat shape (14" wb) with the same components, and I can suddenly I can kickflip again.
I was on the fence about the issue for a long time, and have been perfectly content with the 14.25" wheelbase that is standard. After skating something with a 14" and feeling how much improved it was, I don't think I'm straying too far from there ever again.