Is applying spell effects on Azir's soldiers something that can be removed? Might balance him

watching TSM vs EF today I see many games where Azir gets one single auto and it turns it into a pick because of rylai's slow. if Azir couldn't apply Rylai's slow it would take away from pick potential and chase potential. I remember when Azir came out I struggled a bit because Azir had troubles chasing someone down. I feel like this would help balance him without having to remove his intended strength which is insane dps. right now he is good at everything and rylais just makes him way way too good. this would be a massive nerf, but should it be considered?