I think the problem isn’t even the 50 minutes game but the fact that after a certain point no one is really making any decision.
That because everyone is with so many cards that they basically either nitpick the ideal answer or lose.
People love to say how combo is not interactive but decks with that proportion of reactive gameplay aren’t any better.
You basically watch they play removal and even when they don’t you gonna hit their hero portrait like it was a wall for atleast 2/3 turns until they really feel any need of doing something.
This is result of what in any other game is called poor deck construction but in hearthstone is rewarded because the lack of disruption in the game is a big player on how much someone can ignore the board.