While I agree that, if the choice were mine, I would have implemented a true double elimination; having a single elimination grand final for a double elimination tournament is extremely common practice (from what I’ve seen, despite intuition, possibly the most common) and so we should not discredit the initial design choice as an obvious bug when it was in fact just a feature design choice that we don’t like.
FWIW, anoek has stated that fixing this would depend on overhauling a great many other things on the back end, and will not be happening any time soon