Originally Posted by
pettdan
I think, still think since I heard of this mulligan version, that it will make chalice decks better, which will make fair non-blue decks better, which will make combo and fair blue decks better, going full circle thus increasing the amount of decks that can be played competitively. If show and tell becomes too good, I doubt it, some card may be banned. Hopefully not griselbrand, because that ruins some archetypes of decks, otoh griselbrand seems like overly good so maybe that'd be ok.
And agree that reducing the amount of non-games is great in itself.
Important quote about their evaluation of Legacy through MTGO: