In my opinion as a mission builder the biggest problem with OFP's AI was not its accuracy or pathfinding but the fact the AI always engaged just BEYOND the visual distance you set for human players.
For example - if I setviewdistance 900, and I'm sitting in a tank, I can see ground out to 900m, building and some terrain objects out to 850m or so, and finally all vehicles, infantry, and objects are visible by 800m or so. But the AI finds targets at around 1000m and (depending on their weapon) engages them before a human player will ever see them. Before they are even rendered for a human player.
In other words, the AI does not react correctly to the viewdistance setting. Its especially bad in vehicles with long range weapons. Unless you set view distance to 4000m or so (and in my large missions that kills even modern top of the line PCs), you'll be mostly shooting at, and being shot by, grey fog.
I hope AA addresses this.
Thoughts?