He also has a point though. Levy dithers; it's one of the things he's known for. We've heard a hundred times before how deals are agreed in in substantial detail, then Levy throws a curveball in at the last moment.
If we ran a tighter ship I'm fairly convinced that we could have wrapped up Diaz, but our entire M.O. seems to be to sit and wait instead, "monitoring" a player's status and availability and leaving plenty of room for negotiation and renegotiation. Every transfer target seems to be subject to Levy's requirement of driving the hardest possible bargain first and foremost, and delivering for his coach seems to be a distant second.