From my earlier post in this thread:
Gotta agree that the losing streak came into play, but I read an interview with Johnson after the cut and he seemed pretty hurt that they took advantage of the situation; he was on a two-fight losing streak and they came to him with a week before a fight when he was 30+ pounds overweight to fight one of their top prospects (Gunnar Nelson).
There is the "make me an offer I can't refuse" ideology from Joe Silva that made him take the fight; he was under the impression that they were asking him to do them a favor by offering him the fight, so he figured that even if he lost/underperformed it would make sense why (short-notice/massive weight-cut) and they would give him a favorable match-up aftewards so he would get at least one more shot against a guy more on his level then Gunnar. If he didn't take the fight for whatever excuse (too short-notice, too overweight), he is the bad guy now and they are already in a position where they can cut him since he is on a losing streak (or give him a match-up that is stylistic nightmare for his next fight).
It ends up being a lose-lose, since you have no leverage to not take the fight since you are on a losing streak and don't have much name value.
As I will repeat again, my concern is less about whether or not he "deserves" to be in the UFC and more about what it says when you cut a guy who hasn't made his debut yet was slated to fight on the main card; if he is main card worthy against Uriah, then he is prelim-worthy against a nobody, so it seems like he is being punished for getting injured. Doesn't mean he deserves to be in the UFC, deserves a million dollars, etc.