Bryan,
Spot on, if you look at the end of the fairway on the side closest to the 15th, the part right before the fairway runs out looks roughly the same length as today, but if you start to make your way back to the tee, you can see that they mowed around the mound and the fairway widens out from there (right where the right part of the wishbone path goes). I think you're right that in sections, it was likely wider than today.
Lou,
I had to laugh, when I saw your post, all I could think of was 'THE SEA WAS ANGRY THAT DAY MY FRIENDS!' The Marine Biologist is still maybe my favourite Seinfeld episode. Comedic genius!
Back on track, I've never thought it was overly narrow (with the exception of 1 & 15), but will cast my mind back and have a think. You're probably right that there could be some more room given to make the strategic options more viable.