It's pretty simple: Poe/Maz makes it so experimenting with slower decks (support decks, mill decks, ramp-up decks, etc) essentially a waste of time. You create a huge card-pool of great cards with tons of tinkering experiments you can design with them, then a deck emerges that makes half the card pool valueless.
I hate to admit it, but I'm on the "Fix Poe/Maz or I'm leaving the game" team now. Honestly it's just poor game design. So is 3-5 action-cheats in a row, also really bad game design. Who wants to just sit there with no options while your opponent murders you?