I gotta say, it has been a while since I've read a "improve in ranked in X game" guide and actually thought to myself "shit, i never would have figured that out".
I feel like the basic idea of control vs aggro is naturally learned but only practiced outside of the game. In video games now adays everyone is given one role at a time and they pick that role; that is probably why it is hard for new players to get around the idea that their role can change from game to game.
The tools you presented in the article are also super useful for returning players like myself. I have plenty of card
