Some things I would want are:
-Broadsword missions: Some missions involving the broadswords would be nice(And by involve, I mean Crimson actually flying them), whats the point in adding a space fighter like that if its just going to be in one campaign mission? Maybe have a couple of space dogfight missions or something like the trench run in Midnight, but honestly the limits are, well, limitless.
-Tutorial chapter in episode one or two of season 2: Maybe have a mission in one of the first two episodes that show Crimson how to fly the Broadswords, since they obviously aren’t Noble Six or the Chief, they won’t know how to fly a Broadsword unless given proper training, so a chapter dedicated to learning Broadsword controls would be nice.
-Bigger maps: Self-explanatory, bigger and non-recycled maps that are perhaps big enough for air-type stuff, I 'unno.
-Pelican gibs: If pelicans are going to be included as a flyable vehicle in Season 2 (Crosses fingers please, please, please!) then I think it’ll need a few gib models, that was the only thing that urked me in Halo 4, when the pelican was destroyed and instead of gibbing, it stuck to its orginal model.
-Mantis vs. Locust fight? Kind of like a fist-fight type of thing between a Mantis and a Locust would be enjoyable to watch/participate in. I don’t know about this one I’m kind of just spit balling.
-Showing our spartans during pre-mission cutscenes: When I first played Spartan Ops I was sort of excited to see my spartan in the starting cutscenes, similar to Noble Six in Halo: Reach, but alas, this didn’t happen. But in all seriousness, some cutscenes showing are spartans deploying out of a pelican would be pretty cool, adding and subtracting spartans that appear according to how many players are in the mission (1-4).