What if archetypes never evolved?

I know this question usually devolves quickly into the assumption that every deck would be the same 40 best cards, but bear with me for a sec.

Original DM didn't have much in the way of archetypes, but the character's decks all felt different because each Type of monster had its own style (Rock was defensive, Pyro had burn, Zombies swarmed from the graveyard). As the game has progressed and archetypes took over, most of the characteristics of Types faded away. But what if that never occurred, and Types remained as the primary deck categorizations? Personally I think we’d have a much more enjoyable game.

One of the biggest benefits is that you would be better able to keep your favorite deck over time. Sure not all Types would be meta all the time, but with a more limited number of deck types, it would be much more likely that the set could boost your Type to relevancy. Compare that to what we have, where almost no archetypes return to the meta once they’ve had a turn.

What do you think? Would this have led to a better game? How would each Type have evolved its own play style?