Things are one way and you say they shouldn't be. Okay, but they are. So...? Are you asking organizations like MLG and IPL to hire better casters? Are you asking minor casters to put more effort in to overthrow the "bad" established casters? Are you asking TL to promote up and coming casters more so unknowns get a better shot at being known? Are you asking the established casters to take their job more seriously?
I just don't get the point. You've said "If casters were better, the scene would be better" without offering a path of how to get there from here.