@Riot: Suggested Malzahar W Change

I main Malzahar, and I have been doing so for quite a while. While not the most mechanically intensive of champs, he does have some strategic depth, but unfortunately, he's always been somewhat of a niche pick, with his combo-based kit and lack of escapes making him only occasionally useful as opposed to other, more mobile mage/assassin hybrids like Ahri or Kassadin. What I propose is a modification of his W. As of right now, his W is a circle that deals % max. health damage to whomever stands on it. It's a decent zoning tool and a vital part of his famous ult combo, but I had an idea that would modify this ability to add more utility to his kit. His W, Null Zone, is a portal between the Void and the Rift. This led me to thinking of the uses of this portal as an ability, and I arrived at this new version (changes are in bold):

Malzahar creates a zone of negative energy which damages enemies that stand in it. Malzahar creates a zone of negative energy for 5 seconds. The zone damages nearby enemies for 3/4/5/6/7% (+[1% Ability Power]%) of their max Health each second (damage to monsters is capped at 120 damage per second). ** If Malzahar is standing on top of Null Zone, he can recast this spell to target location, teleporting him to the center of the new circle. The second cast deals no damage.**

This change would allow him to fill the Kassadin-type role of the Anti-Mage, roaming the map and deleting enemy carries. This would also synergize well with his ultimate to catch up to and attack enemies. I would love a Rioter's opinion on this!