Actually, I have considered the move 2... Bd6!?, but I don't see how it is better than 2... Nc6 and 3...Qe7. You avoid the bishop getting blocked, but you still have to defend the mate threat with Qe7, which isn't Black's most useful developing move. After you move your bishop again, your queen will still be on e7, when you could have used that tempo to move your queen to a more useful square such as e6 after exchanging light squared bishops and giving white doubled c-pawns.

One of white's problems with the 3...Qe7 variation is that c2 is weak, but white can avoid that problem by delaying the development of his queen's knight until the Queen's bishop is developed to g5.

The move that scares me the most is 2... Nf6!?, when black gains three tempi for the pawn.