I had no problem with the AI in OFDR either...except for driving. I found that if I had one drive, they did well if told to "go there fast" but at a plodding pace they could barely navigate. On foot, they did precisely what I told them to do. I found that it was fun to play almost as an RTS, having the squad do a lot of the work while I mainly just commanded.
... if your part of a squad and your squad leader tells you to move to this point and provide overwatch for another fireteam in your squad... your options ain't many... your statement is true in a true, open sandbox game... but if you have played Red River, you'll know that your just 1 fireteam of a squad and thou you have limited areas to move in, thats because in Red River your suppose to keep your other fireteams in view.
That's how DR was too. It's just a sign of the times. People are used to the "behind enemy lines" super-soldier or squad on their own to win the war type games. When something like this comes along, it seems faulty to most people if you aren't there to completely save the day solo. It's simply a more realistic design where you and your squad have an actual role
to fill. If you don't, people other than you and your squad die. It's a different mindset, it's not Halo or COD.