Kibayasu

To those of you who have played the vanilla single player campaign of OA, I want to know if its more straightforward than ArmA II. If its a set of missions resembling the OFP's or the original ArmA I plan to buy it as soon as possible. If it has those "open world" type missions than the main campaign had, it's a harder sell. Multiplayer was fine as always, but spending $40 on an expansion when I already have plenty to do with the original's multiplayer is something I won't do. So, in short, are the campaign missions more linear in nature or does it retain the large area to explore and complete objectives in?

I just have one question about OA before I buy it and that is in regard to the mission structure. Are there many of the same kinds of "open world" or "command" missions in OA that there were in ArmA II? I liked the concepts but the things never turned out all that well for me in the end and pretty much bottomed out any enjoyment I could get from the single player campaign. I much prefered the mission style of OFP and ArmA I where it was somewhat expansive but much more defined. If you tell me there's only a few of those (or none preferably), I'm going to buy it right away. But if I have to spend almost the entire single player campaign dealing with a lot of the same problems that I ran into with the original... well, that's just not worth it.