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.
Do you really think the designers are just making changes abritrarily, without any sort of feedback from the community? From the very beginning, the wizard has been considered to have some of the most powerful dailies. Many folks have seen, firsthand, the ability for wizards to shut down encounters on their own - something most classes can't do, no matter how many dailies they bust out.
And often it wasn't just the wizard's dailies being unbalanced compared to other classes. It was that one or two choices would just be better than other options.
Look, you feel that it was balanced as it was, and that you prefer the previous version. I can understand that. But stop with insisting this was just 'change for the sake of change' - we have numerous folks in this thread reporting on their own experiences with these powers being unbalanced, or with having characters criticized for the lack of these choices. That means it was an issue.
It is perfectly ok to disagree that it needed fixing, but dismissing the opposing viewpoint entirely, and insisting that their opinions either didn't exist or shouldn't matter to WotC... sorry, but that's just not cool.
So what's wrong with an enemy taking damage and then deciding if it wants to take more or move?
I think what you are missing is that the wizard can move these zones. If the enemy leaves the zone, the wizard just moves it back on top of him. Thus, there is no real reason for the enemy to react at all - all the power does is damage, and a good amount of it.
If the damage happens at the end of the opponent's turn, then they actually have to make a choice. Stay in the zone and take damage, or get out of it. Getting out of it might involve provoking, it might involve being unable to flank, it might even prevent them from attacking at all depending on position. That's control.
Automatic damage that they can't avoid? Is not.