For 18, I'd like to see them create a tournament specific tee over near the 16th green. This would help to bring a bit of dogleg into the tee shot forcing the players to navigate the bunkers as they either try to play over the lefthand set or short of the righthand set. The new angle would also stretch the hole by ~50 yards.
Of course there would be some logistics issues when it comes to the 17th and 18th crossing and how you navigate the spectators in this area. And people would complain that they wouldn't get the chance to play the tee during normal play, but I'm ok with that.
What if you reversed this idea and had the tee in the top left corner of your picture, near that par three green?
You'd have to take down a lot of trees, and you also wouldn't actually be gaining much added distance. Same with teeing off behind #1 Red. You might actually be losing some since you can only go back about 10 yards behind that green before it falls off down a hill.
Ben, yours is a much better idea than using the 18th green on Red hybrid, which would also create major logistical issues with tree removal and room for grandstands. Very creative, thank you for doing the rendering. I think the main issue, other than the loss of some of the most valuable grandstands, would just be the flow. Would players on 18 tee have to wait for players on 17 to play? That could take a while. And vice versa, it's possible players on 17 tee had already been waiting quite a while to hit.
I believe I read that the original plan during the renovation was to move the 18th green back up the hill, but the idea had to be sacrificed due to budget issues. Honestly, going back another 30 yards probably wouldn't make that much difference for the pros anyway.
I've always wished they would at least cut the grass at fairway height all the way up to the front of the green and steepen the front edge into more of a false front. I wouldn't even be angry watching my ball tumble 70+ yards all the way back down that hill.