That Raynor and MacDonald didn't build in:
1. An optional route on their versions of Long? To honor the play down the 5th at the Old Course?
2. That considering they built steep and deep bunkers, didn't build Hell? It was one of the most famous hazards in the world in their day, and back when MacDonald was playing Hell, it wasn't the 100% revetted crater it is today. Back then only half of it was revetted, the other half (left side... if I recall correctly) was grass faced and didn't seem too deep.
One would think they'd have paid homage to Hell, and considering his love of the Bottle hole, and other holes with options, and allowing the golfer to "tack", he would have built options into some versions of Long.
Perhaps there were options but with the narrowing of courses, have disappeared.
The famous Mackenzie illustration of the multiple options came out years after NGLA was constructed, but MacDonald was surely familiar with the option of playing down the 5th.