Sounds like they took the good parts of CoD1-3 (the run for cover bits) but then screwed up the rest.

While the grenade icon has always shown direction and never if it was in/out of a wall it never bugged me like you. The one thing I will agree is complete shit is your stream of never ending enemies. I haven't come across that, and that's garbage...and the fact it's a line walking scripted path because I've always taken a wide approach when re-doing COD stages going through another piece of a building, other side of the street, different cover. You make it sound like that can't happen which is just plain wrong. Not sure why you're whining about the team though, you never could give orders in any COD and they've always taken respectably good cover spots and assisted (though very slowly and ineptly) to pop off the enemy.