Divinity 2 is bound to be compared to its predecessor with the stupid name. Does Ego Draconis put a stop to those discussions? I think it won't be as bad compared to Divine Divinity, but it isn't a name that would stop that debate. A debate you wouldn't want them to have in the first place.
Ehhh...still, you're talking about the first game here, and like I said, there's nothing to be done about that title or the negative comments and feelings it generated, except to not repeat the same mistake. I too think Divinity 2 would have been sufficient, but Ego Draconis isn't going to land in any bad names lists.
