Comment by reificator

I did not order the list of effects by importance or impact, I ordered them by what came to mind while I was typing.

I touched on low to the ground aggro decks in the very next paragraph, and I agree that's probably the biggest issue.

However aggro decks becoming more powerful does not mean control decks cannot also become more powerful. Decks aren't a one dimensional plot of aggro to control with midrange in the middle. (though to be fair I did say "on the other end of the spectrum" in my initial post)

When I say higher mana value cards are more playable, I mean in the sense that they can be cast "on curve" much more often, because if you want to cast a 7 drop on turn 7 without ramp you can choose do so, while with a normal deck you might expect to hit 7 mana between turns 8 and 11. (Not a hard calc, just a gut check)

If you have to answer your opponents' threats 1-1 early you can refill with answers, and if you get ahead with 2-1s or 3-1s you can keep drawing land to play your expensive threat on curve.