To be fair, I am not certain that Scottie is saying that the deck that wins at 5 does not also have a 100% chance of winning.
And that right there, is one of the main reasons our scoring system is atrocious.
It is unfortunate - and on this I believe we agree - that speed actually matters for the LS right now. This is of course just the same argument that was had last year about the DS, only about their win condition.
In the end, I believe that any problems we see apparent about the game with boil down into a very small set of categories; of which tournament scoring and card errata/rulings are among.