It must be frustrating to have a roster of such talent, then see them limit their sights on their goals and dreams, just because a teammate stand in the way. It may not be an ideal scenario to find yourself in, but you wanna be a champion and the best in the world right?
To see a talent like MacDonald blaze through a solid opponent like Mills, then say he won't attempt realising his dream of being a champ, because GSP has the belt? It's crazy! If GSP moved up and MacDonald won the belt off someone else, people would always say "he only got that belt by NOT facing GSP". You don't want your MMA legacy to be remembered for that fact.