Variety is nice.
Also, this seems a conversation between two different ways of putting up routes - FA'ing in the traditional sense versus route setting. Times are changing but don't want to lose one in exchange for the other, yet it seems good to recognize the value in each different focus.
Too, I was just this weekend thinking about erosion or impact of natural forces on a route as an exception and what if the FA party wanted to 'update' the climb in this case. Or, there is also the case we've seen of some friends who hiked a tall snow cone in early May one year to start a route on Minerva. This route went in ground up, and they wondered about repeating it after the thaw if it would be too high a first clip. Not sure what happened with it yet, but that's part of the same category.
Also, what about climbs where the fa party feels they may have gotten away with something on a ground up adventure? What if they wouldn't want to climb the route again without the addition of fixed pro in a key spot or two but would really want to climb it again with it? Seems now a days most communities hope for the key addition of fixed gear at all if it makes it at least a bare minimum of an R instead of X or better yet a PG instead of R. I've heard the staunch view that it should be left as is bc if they were able to do it with the bare minimum and LNT, and why take that away from the next party to give that line a shot...
Whatever gets decided it is up to the FA and however thick skinned they may be in a jury of their peers. It can be tough, but I really think that is a good thing. Variety is good. It's all great to discuss, but ultimately hope this stuff doesn't get decided by committee, or creepy stick clip breakers.