[Viva Los Expos]

Allowing GMs to do their own contract extensions would make it a pointless feature. There's no way (other than the honor system, I guess) to stop an owner from doing the following:

1. Download and unzip league file
2. Negotiate using hardball tactics
3. If player breaks off negotiations, "turn back time" by re-unzipping.
4. Repeat 2 and 3, making marginally better offers each time, until you've discovered the minimum amount for which a player will sign.

It reminds me of previous versions of Madden football (it might be in the current version, too, I haven't played it): players never broke off negotiations, so the obvious exploit was to offer the lowest possible amount and then increase it by tiny amounts until the player accepted. It made the whole process pointless; they should have just had the player tell you his bottom-line, non-negotiable demand.