Ron, thanks for this fantastic tour.
I'm not a big fan of the 15th as not enough of the punchbowl is pinnable and there's little reward for accuracy as just about any approach that finds the punchbowl will migrate closer to the hole. (Then again, what do I know - I chunked my mid-iron right into the pond) Again, very similar hole at Mountain Ridge. Quirky and fun, but not one of the better holes on site.
The 16th would be better without the fairway interuption as Doak's drive down the left side found the down-slope (big hitter, The Doak). Not sure if at least the left side could be maintained as fairway but a turbo-boost opportunity would be ideal (can't recall but it might be a little soggy down there).
As for the 17th, shame on you for recommending any change.
This is an outstanding strong two shot hole. Like you, I drove it right there - I can't help but wonder if the left-hand fairway bunkers, easily carried, don't steer tee balls in that direction. I don't recall the tree encroachment on the right side of the fairway so perhaps the handful of single trees have been taken out. Ross' use of the depression short of the green that also meanders in front of the 11th green is brilliant routing. This hole has it all and is beautiful as well.
The 18th is a rather pedestrian finisher but not unlike the 18th at Holston Hills it gives the golfer a final shot at redemption, an opportunity to finish strong or a nice decompression before the 19th hole.
While not the "best" of the 21 Ross courses I've played, it makes my top three favorites.
Bogey