Could Vel'koz's Hitbox Be Reduced?

Vel's win rate has dropped significantly the last few patches, in part due to itemization changes, but also due to buffs to his counters.

I don't think his kit is in any need of a change (besides E being changed to an actual knockup, as it's currently coded as a suspension and can be reduced by tenacity), but one of the main things that makes Vel so difficult to play is his GIGANTIC hitbox. Vel's hitbox, for whatever reason, includes his tentacles, and makes landing anything (point and click, skillshots, whatever) extremely easy. If his hitbox could be reduced slightly by around 10-15%, it would be an indirect buff and much appreciated help in staying alive as an immobile mage.