I'm right there with you on that. However, One clear example of what I'm talking about was when we played Toronto last year. I know many people on the board, myself included, were completely confused as to why Nate did not put Joel in. If you remember, Toronto kept running the pick-and-roll, ended up with Roy on Bosh. We were totally abused in the paint for the last several minutes, and it lost us the game. To me, this was a perfect example of Nate having the choice to give Joel just a few more minutes to fill the obvious holes, but he chose not to.
If memory serves Nate said that he wanted to have LaMarcus there so he will learn how to deal with pressure situations and late game issues and he wanted Travis in there as well because Travis was pretty good at the end of regulations (he had the 4 point play to tie the game and send it to overtime). I might be confusing this game with another - but I think that was the case you refer to. Anyway, while Nate can not always guess right what to do - I thought he did a pretty good job overall last year -including Joel's time - given by the fact that he played 77 games...