Landing the sweet spot of any of his Qs additionally resets a dash. It would reward skill in using his abilities, cut down on clunkiness, while maintaining counterplay.
I think you'd just end up too able to reliably chain dashes, honestly. That's up to THREE dashes per Q, which is enough to ensure that every Q hits with a dash to spare if you start out with 2 charges.
Honestly.
I just want him to be able to move during the channel.
The knock up for hitting the sweet spot on his Qs is the reward.
Additionally they've stated in the AMA for his rework that being able to walk while casting his Q would make it wasy too easy for any player to land the knock ups . It'd function exactly like Camille's tactical sweep but he'd have multiple to cast in rapid succession. That wouldn't create any room for counterplay if you could imagine facing a Camille that could W you 3 times in a row slowing you over and over and over.
