I respect that 343 had a really mighty task ahead of them to try and put together a cool story to follow up the original Halo plot line, but I just connected more with Reach than I did with Halo 4. Reach was basically the epic battle against the covenant that I'd wanted to see since the original Halo. Everything came together to make it my favorite Halo campaign yet.
I just wasn't feeling the whole fight against the Didact in the same way. And the covenant just seemed to be around because if they weren't there then there would only be three enemies in the entire game.
~ IN THE FUTURE there will be no black people and white people. Just robots.