LOVE the Rammus rework except...
Now you probably think this is just a case of "oh no my champion isn't OP"- but that's not it at all.
Effectively, the only balance Rammus needed was his W: With increased potency, and lowering Movement Speed it gives him that much needed "tank" image. It also balances the gameplay by crippling his engage while W is active- no more kite and taunt. Which is a healthy change. I'll miss the easy taunts- but it was needed.
But bear with me- how many other champions' peels can be cancelled after being cast by a silence? Powerball is not a channeling ability- you spend mana on cast. Therefore, once you cast the ability- the following effects are not a spell cast, therefore shouldn't be cancelled by a silence. Garen doesn't stop spinning when he's standing in Soraka's Equinox (silence pool), so why should Rammus??
Furthermore, on a side note- if we're going to rework champions then hold off until you work on Nunu. I mean- Nunu is the same point and click simplicity he was since Season 1. And we're focused on reworking Garen for a fifth time because he's your love child? Come on now. Nunu: Passive: 5 basic attacks makes next spell free and better. Q: Point and click true damage sustain against non-champions. W: Point and click Attack Speed and Move Speed buff for Nunu and ally (can target minions, and doesn't prioritze when trying to click an ally making it so you click minions more often than your Tristana.) E: A weak point and click damage and slow. R: Channel ult, slows enemies inside while channeling- highest base damage of any Ult in game.. but can be cancelled by any form of CC.
The W is practically the exact same as WW's original W.. anyways- Nunu needs the rework nobody else.
All of these champions have something Soraka can cancel with her Silence after mana has been paid to use them.