What if...

... Riot made all mobility targeted towards enemy units, or allied champions in the case of, say, Lee Sin or Braum (though the latter is not as much of an issue), and made all hard CC skill-shot based?

Point and click hard CC punishes immobile champions more but is required to counter mobile champions, so take away untargeted free dashes and voila, you have no 10 second flashes and immobile champions can become viable.

Also, Annie's stun passive should have a timer in which she has to cast spells in a certain timeframe to obtain the stun, and cast her stun within the timeframe as well. That way, if she wants to have that stun, she has to actually burn mana and cannot zone melee champions simply by holding onto it.

Thoughts?