I'm also a legacy user and I believe the day they remove it, they will also say goodbye to a big part of the players.
I completely agree with you, the new version is confusing. I don't really care about the new unit images, the zoom, the fancy sea, or any of the new graphics.. It's a strategy game so I just want to have a clear vision of the game situation. In the legacy mode you can see exactly where the troops are, where they are heading and the composition, whereas on the new version you can't.. It's as simple as that I think.