Snowball shouldn't give vision on stealth units
It should allow to dash on them and damage them, but granting vision on stealth is just way too strong against stealth champions. And there are already a lot of items to counter stealth in arams : 
It should allow to dash on them and damage them, but granting vision on stealth is just way too strong against stealth champions. And there are already a lot of items to counter stealth in arams :