In Season 5, we should finally see some meaning full use of Silence/Stun vs. cast time/animation.
So, we've seen it for 4 seasons already, but it's time to finally put Riot on the spot;
You need a counter mechanic for spellcasting that isn't "Silence/Stun and murder them before they do anything."
Case and point, would be things like Ezreal or Lux ultimates having a VERY exploitable windup animation, but no punishment. You can even DIE before it finishes, and it will still fire off the spell.
A bit of a rage post after a bad game with a 'feed fb and quit' Riven top and a toxic TF, but it only sparked irritation when I fought Ezreal as Lissandra, ulted him just as he started the windup for his ultimate, and then literally from nowhere the missile appeared.
Come on, guys, you're embarrassing yourselves.