I didn't like Shane, but you're not supposed to like him. He was a good character. And in truth, I didn't disagree with a lot of what he had to say. You couldn't pussyfoot around and lead by committee in a situation like they are in.
There are still a few characters that get on my nerves in the show, and I am just tired of them. Lori and Carl, primarily.
The loss of Shane's character really leaves a void in the show, in my opinion.