While most of the changes in the recent 2.3 patch that made it to the PTR today are well-known, there was one interesting note from the official World of Warcraft notes on the 2.3 PTR notes for Rogues that I haven't seen before:
Kick: Interrupting a channeled spell with this ability will now always properly prevent casting spells from the same spell school for 5 sec.
Now, I have Improved Kick for PvP:
Improved Kick: Gives your Kick ability a 50/100% chance to silence the target for 2 seconds.
I honestly didn't realize Kick was broken. And now it makes me realize how relatively worthless Improved Kick seems. How many schools of magic do most casters employ? Two? Three for mages? I hope that Blizzard also takes 2.3 as an opportunity to look at Improved Kick and improve it somewhat (we can call it Improved Improved Kick). A one tick silence doesn't really seem all that useful when we are already silencing for 5 seconds the school of magic they were using when we kicked them.