There's things I'd like to see K do, as well. Then I think to myself....you know what, he's probably tried some of those things in practice and he's not comfortable enough in his team to trot it out there in a game. It's not that I think K isn't open to criticism, because he certainly can and should be. But in all honesty, I do think he knows more about this team than all of us posting here combined.
Just because this team has some obvious deficiencies doesn't mean they're all easily correctable. I think the best basketball coach of the modern era, while maybe a little stubborn, knows this team has weaknesses too. I also believe he's trying to 'coach up' his team to the best of his abilities.