So I love Snowball on ARAM, but...
So like the title says, I love Snowball. Riot did good adding it to regular ARAMS. That said, I have two major issues with it. One to do with balance, the other to do with the idiots on my/their team.
First, the balance issue. A few champions are completely, insanely, unfairly nutballs broken with Mark/Dash. Those would be anyone with ways to escape the immediate retaliation from going in on Snowball. LeBlanc and Zed just gibbing someone then zipping out because they had a teleport set up is insane. (Easy fix there, by the way, is to just make it so going in on Snowball erases your Distortions/Living Shadows already out.) But that's actually a minor issue because you only see it so often.
Now let's talk about what REALLY rustles my jimmies with Snowball. If you are a squishy with range on par with a howitzer , no escapes, and generally just no incentives to be closer than is strictly necessary to the enemy (coughcough

cough ), DON'T. TAKE. SNOWBALL. Seriously don't. I don't mind if you want to mess around in ARAMs since that's what they're for, but that's just straight up feeding.