I think Yandle's name in the trade rumor mill for the past few years signifies that the 1-2 defensive gaffes per game (which is kind of a low estimate IMO) are weighing on the minds of management.
I love Yandle's loyalty, his team play, his effect on the room, his incredible transition game when he gets a chance to use it, and his shot (when he takes it and doesn't pull the ol' double-clutch move). But here's the thing - it's questionable that the Coyotes have enough talent and depth to compensate for all the other stuff, and that's a very practical concern.
Before OEL came around, Yandle would have been untouchable, IMO. But OEL has all of Yandle's skill and virtually none of his baffling lapses. With Murphy and Gormley on the way and Summers resigned, I don't know how much longer Yandle sticks around - especially if some team gets desperate and offers us the moon for him.