I try to teach my juniors that balance is the most important thing because in every level, from little league to MLB on the throw you must be balanced. I also teach them the relaxed four seam, and to throw the ball at firstbase, not the firstbasemen. I dont realy like "hot dogging" in a game.
I understand what your getting to about the pitchers being so concentrated on the pitching side of baseball, but no matter what the situation is a bunt "has" to lead to an out somewhere, if not its a failed play. The pitcher should be able to throw balanced an accuratly no matter where they are on the field.
For the others (admin) the question was about drills that can make a pitcher a better fielder.
Thanks for the help.