"Destruction and Improved Destruction have been changed. These effects now have a duration of 20 seconds each, and reduce Fortification as well as Armor Class. Destruction reduces Armor Class and Fortification by 1% every time this effect hits an enemy, up to a -4 AC and -4% Fortification. Improved Destruction now reduces Armor Class by 2, and Fortification by 2%, up to -8 AC and -8% Fortification."
It's not much, but it's something more! I know acrobats will be happy to get a little more use out of Rahl's.
I am curious as to whether the two ability's debuffs will stack with each other though.