If this is simply a paid mod for ArmA 2 AO I will skip it.
They would need to make functional AI that can hit a target 20 meters in front of them, a proper mission editor UI, vehicle AI that can stay on their waypoints on the roads without diverting and getting stuck on fences, weapon animations (no animations for bolt actions would be lame, immersion killing, and awkward) and a decent squad control interface at minimum for me to buy it.
Sadly, I think this will just be the case as with ArmA 2 and OA... just a tiny bit of improvements (that should have been released for free as bug fixes in ArmA 1, such as reloading while walking) but largely the same dysfunctional game.
It is a shame to.