i know right they made him look soft and the reason he cared for his planet is becaus he ruled it and was born their but in secret of the omnitrix he didnt make a deal for the saftey of the universe is because vilgax knew how to turn the self distruction sequense off ,he knew alot about the omnitix in OS but not in AF
I also hate this incarnation of Vilgax, but the situation may be defensible. In Secret of the Omnitrix, he did seem a little skeptical when they mentioned the self-destruct sequence. Also, it appears as though Vilgax was not yet so highly revered by his people at the time. The planet was renamed Vilgaxia some time between then and Alien Force, unless it was retconned to have always had that name. Anyway, he may have come to care more for his people during that time. On another note, he may have taken the events of Ghost Town personally, meaning what he did was more about himself than his people. But then again, if that was the case, he likely would not have enlisted the aid of his mortal enemy. Which raises another question: whatever did happen to his robot armies?