The story was a bit bland, but was a masterpeice compared to the gameplay. On Tip of the Spear, only a few hours after I got Reach, as I watched the beginning cutscene I thought I was going into an epic battle...only to be let down as I got stuck somewhere else.
Legendary is fairly fun on Reach. It was actually somewhat challenging. Exodus was most challenging of all. I questioned why this was, and I came up with this single conclusion: Its the only level Noble Team doesn't hold your hand(NA has falcons and exploits galore, hardly counts). I realize you are a "squad" and everything, but I would been OK with more instances where you get cut off.
That basically leaves Exodus,New Alexandria, 50% of The Package,30 seconds in LNoS, and Lone Wolf, if that counts at all. Sure, you still encounter parts where your squad mates aren't useful(Jorge fighting the zealots in WC, Kat in Tip of the Spear, ect.), but almost all of the campaign is no challenge,on Legendary or even LASO if you know what you are doing.
[Edited on 12.29.2011 3:01 PM PST]