Since when did the Wizard's daily powers need balancing? It seems to me that the only time anyone talks about inbalance is when the designers change something and people try and justify those changes. There were no balance issues with daily powers.
Also, the controller is supposed to do more than just push, pull, and slide. Control of the battlefield is just what that is. The striker and the defender are not always supposed to be the ones that get in the killing blow, that is available for all classes. The purpose of battlefield control is to set up zones to break up enemies that gather together in groups, or bring out enemies that are trying to stay away from the PC's so they don't get killed. The whole entire reason for having damage in the beginning is so enemies won't stand there and take damage, you are exerting your battlefield control abilities and making them move. Also, PC's with enemy moving powers can move those enemies into those zones so the enemies will take damage at the beginning of their turn and have to decide if they want to stand there and take damage, or get out and lose some actions.
Right now with zones being at the end of their turn, they really lose no actions. They can still attack and then move out of the zone.
As I have stated before, a Wizard's zone effects all creatures so enemies can use a PC's own zone against them, so it is not a win win for the Wizard who uses Stinking Cloud of Flaming Sphere. I have had to drop those spells and lose them because a clever creature kept moving my own people into my zones and hurting them. That was two spells wasted because the creature used them against us.
There are no balance issues when it comes to a Wizard's dailies. That's BS, just like it was BS when they tried to say that the Cleric was stepping on the toes of the Wizard. Don't create balance issues where none exist.