I'm trying to back out of this discussion before I totally repeat myself but I do have one followup question for Sean, first.
So let's say there's a course with a perfectly reasonable set of tees at 6,400 yards or whatever. Akin to the member tees at a UK course. And let's say the walk works out well for playing those tees. You take the obvious path from one green to the next tee and there's a direct route to those 6,400-yards tee boxes.
What I'm hearing is, as an ideal the course would have just those tees. Anyone who wants to play the course can just play from there. Clean, obvious, clear-cut, simple. And a good walk with no backtracking and so forth.
Here's my first question. Would you view it as a major downgrade of the course in your estimation if every hole also had another set of tee box 40 yards longer? You could still have the good, direct walk but anyone wanting to play the course at 6,900 yards will have to backtrack on every hole in order to do it.
And second question. Would you view it as a major distraction or lack of "integrity" if there were another tee box 50 yards forward of those 6,400 yard tees. You'd possibly see it when standing on the "real" tee box and you may have to walk past it on the way to the fairway after hitting your shot. But anyone who wants to play the course at 5,800 yards will have to walk forward 50 yards on each hole in order to do so.
In other words, is your objection to the very presence of longer and shorter tees? Or does your objection only occur if multiple tees force you to backtrack, etc?