At this stage of a season - desperately close to some goal (making the post-season, avoiding relegation, achieving promotion or international competition spots) it's not about how well you train. How many times have we seen effective, but untested players get benched during these periods? Right now is about knowing what to expect from your players, and getting the job done. I'm not saying that we shouldn't throw some kids in there, but coaches don't like to mix it up towards the end of the season.