Patch 3.0.2 will bring with it major changes to the way the game is played, all in preparation for Wrath of the Lich King. Mechanics for virtually all aspects of game-play will change somewhat, and all classes will get new talent trees and spells. The patch notes are long and extensive, and they're not even done.
The notes give a clear warning "The current patch notes are incomplete, but will be progressively more comprehensive in each patch." Things are not done. Indeed, these notes even go on to mention that Blizzard is still modifying and balancing the classes.
Read below after the break for the complete PTR 3.0.2 patch notes. Sit back with a drink and read over them all, it's going to be an interesting patch!
(Psst! Looking for the short version? Check out the TLDR version here.)