Hey man, I am also an offline player and as the newest producer on EA UFC, I really wanted to make a difference with the design and implementation of the Ai and all our Offline Modes. I want to guarantee that although the Ai in the Beta has some holes, they have been fixed for our Final Launch. Some of the ways we have fixed is with the Ai dealing with cage cutting and how to move with an opponent who is always moving backwards. I can guarantee, you will find the Ai challenging whether it's in Fight Now, Tournament Mode, or Career Mode.
As for Legendary difficulty, it has beaten myself, our Gamechangers and Legendary Career Mode is another step up with no rematches, no HUD, and no retry for Learn/Sparring. I fully expect there to be a challenge for all types of users from our novice user to our most hardcore users. You also have the option in Fight Now Custom to tune and change the difficulty through sliders (damage, stamina, transition speeds) to make it even more difficult.
With all the additions i have mentioned plus more, i hope EA UFC 3 brings a challenge to our most hardcore users, as that has been my goal since the start of this project.
Plus, i really hope you guys find some Ai exploits so I can make skynet work on something other than his guitar skills.