In fact we run much better left than right. Kosier can move his feet and get DL out of position. Davis can not not. Just look at the play with Barber when the LB shot the gap Davis pulled left and simply wiffed on the block. Barber got hit. Everyone did their job except Davis. On the other plays when they ran behind him -- those are his for not getting push IMHO.
Now with that said, Choice is a better short yardage guy than either Barber or Felix. Choice is a one cut guy. MB and Felix shuffle their feet way too much. Reminds me a bit of the Barry Sanders v Emmitt discussion ...... give me Emmitt when you need yards in tough situations b/c without penetration he always finds a crack of seem, hits it hard and gets the inches you need. Felix and MBIII just don't do that.
Lastly, JG is an idiot for running the same plays over and over and over that don't work. I mean a play action or role out is an option you know. QB sneak. So many options but none are explored.