I was hoping (and I'm still hoping for) for missions that cater to a specific type of gameplay. Have a training course level, a sniper level, a stealth level, a race level, a firefight level, an air vehicle level, that kind of stuff. It's still possible to a certain extend but loadouts hinder this kind of stuff. The levels that we've seen so far don't bode that well for the future missions either because so far we've just been thrown into an area, had to kill some dudes, go to a waypoint, press a button, move to the next area and kill more dudes until a Pelican pick you up. Only variation being that there's vehicles thrown into the mix every now and then.
We also just played 4-player co-op - which is the point of Spartan Ops - on Legendary and we just blasted through the last level in a few minutes without much resistance and only a few deaths. That was with me just trying to get out of the map we weren't even fighting at full strength. Maybe it was the level, but it looks like it's just way too easy to complete a level. I personally enjoyed it more when playing with less players or even on my own, but even then the infinite respawns take away any kind of challenge.
In the end I wish it was more like Call of Duty's Spec Ops where missions are focused much more on one specific type of play and it's really challenging just to complete missions, let alone doing so with a good score. It's more arcedey which I like too.