Are you serious? Look how bad florida was last year they need ALL the help they can get.
Zone blocking is better used when your trying to trick defensive lineman by pulling lineman in different directions. Its almost like your trying to stunt block compared to defensive linemen trying to stunt and switch positions while rushing. There is NO benefit in zone blocking when passing UNLESS your trying to set up a screen pass or draw play because there is a "run/screen pass" option built into the play.
Side note - the only other time zone pass protections is "decent" is if your offensive lineman are a bunch of BEAST and maybe 1 of them need double team help. For example your starting LT goes down to injury and you put your back up scrubb, so why not zone block assign to help his scrubb arss out.
http://en.wikipedia.org/wiki/Zone_blocking
Zone blocking is a technique in
American football that is a simple and effective scheme for creating lanes for running plays.
In a zone blocking scheme, fleet-footedness and athletic ability trump size as desirable qualities in offensive
linemen. Coordination and technique matter more than muscle in implementing a successful scheme because defensive linemen are often double-teamed at the point of attack. Creating movement on the defensive line is more important than opening a specific hole in the defense.