No it would not, as one of you said the entire point of Halo is to give you the feeling that you are fighting for your races survival. They already said you can play as the covenant in multiplayer, but there will only be a UNSC campaign, and talking about it is like talking about space battles, you noobs come in, ignore every post that is made, and say, I say yes, because it would be cool.
Well I'm not going to go into space battles but the thing is that just like this they would have to have made this decision around announcement. Furthermore your opinion is not going to change their minds.
Sometimes you have to give things more than 5 seconds of thought.