CE/IE seems like a great idea, but at this point it would probably just start another round of buyouts. It would be awesome if there were a tournament of the same level of significance as eternal weekend that allowed proxies. Just the thought of that makes me think it would be a huge Vintage tournament, but who knows, maybe it would not be that popular. We are definitely past the point of average people playing sanctioned Vintage, and it is not likely to change. I love playing on MTGO, but I know that there are a lot of players who would like to play in paper tournament as well.
I'm not of the mindset that power nine cards need to lose their value for other people to play. The value aspect of the problem makes it really difficult to solve. However, I think that Vintage's increasing popularity will result in some type of solution. Decent sized proxy tournaments already happen, so hopefully they just keep getting larger and more frequent.