Cho'Gath needs a buff

Cho'Gath was my main before Vel'Koz, and i thought that he wasn't really good at killing champions. His ult is great, his Q is great, his passive is great, but his E and W are a little underpowered. Most of you will disagree because he has good CC and he is a great tank with his ult stacks. These are some of my ideas on a little rework or buff. About W: His W has small range, they should add more range to it or a longer silence. About E: It is great at clearing waves of minions or monsters, but it doesn't help in taking down champions. It should have passive and active. Passive would be the same as the current E and the active would throw out a wall of spikes that would last about 3 or 4 seconds and blocks movement but doesn't block abilities or he throws a wave of spikes like the Evelynn's Q that does less damage but goes further.

Those are my ideas on Cho'Gath's rework or buff.