One of the critical things I should ask from bis is this.
* Add support for Dual Core and MP processing, OFP1 Server code will not cut it as you can see that the dual cpu market is about to boom and its becoming hard to justify buying a single core setup just to suit OFP.
So have that as a MUST, there was details about the different types of threadings you could approach but Im no wiz on that. Just have good support for it
* Another suggestion was perhaps you could add in the function to LINK missions in Multiplayer, so you can play a entire campaign without choosing the missions part by part. Perhaps allowing the missions to be selectable after you select the main campaign in the mission list then using the param1 and 2 selections for the inbedded missions?
This would just open up a more easy management of OFP MP stories.
Also I can't remember my chats with BIS a while ago but does 1.5 support underground tunnels etc as in caves. Cant remember if that was in or not.
I'm sure there are lots more things but for now that is all I have on mind.