Unless you have beaten the game, I would recommend not reading this thread, seeing how it contains details as to the last boss and some major plot points. Now, you've got fair warning that there are major spoilers in here, so I don't want to hear anybody complaining if they read something that they weren't aware of. That being said, I will now continue to the point.
So, when you get to Vayne on the Bahamut, a small exchange is had that occurs I believe after you have defeated his first two forms. Venat tells him that he has liberated the humans from the Occurians. When I read that, I thought to myself, "You know, it's kind of true." I mean, after all the Occurians were convinced that they were going to shape Ashe's destiny and make her become the next Dynast-King (Queen... whatever), and during that cutscene they even said that they were the writers of history and that Venat had committed heresy by going against the Occurian way and trying to free the people of Ivalice from their grasp.
Obviously when Ashe chose not to take revenge on the empire that was a big step towards the races of Ivalice gaining their freedom, but several things that Vayne and the Empire did helped as well. For example, the creation of manufacted Nethicite (though made with the help of Venat) was a step towards freedom, after all, the Occurians used the deifacted Nethicite to control the humes and would not have wanted the humes to be able to produce it on their own. Also, the subsequent result of the use of manufacted nethicite was the ability to call upon the powers of Bahamut and use it against the resistance. So, Vayne actually did some good in the end. Despite his need for destroying any who opposed him, he also realized the need for the people of Ivalice to be free. So, I don't think he was entirely bad. What do the rest of you think about this?