Lexa, I like your ideas regarding Teleport from this post very much: 2.7.0 __S-22 Wizard Update/Balance Mega thread - #12 by Lexa-2365
But knowing Blizzard, it would be too much work for them for one patch.
So I would settle for simplest and fastest solution: lower Teleport cooldown from 11 to 3-4 seconds or make that Aether Walker would also increase Wizard’s damage by 300% (150% is indeed too low). Yes, it would be mandatory then, as is almost every newly buffed item.
Additionally Illusionist passive’s movement speed increase should be increased to 60% and duration to 6 seconds.