I think the problem is not so much the civ draft, but more the rules of the civ draft. Since kotd1 pretty much every tournament has used global bans and global picks. If you were to use "normal" bans and "normal" picks you would get closer to a hidden pick civ, but instead for the entire series. And if you would change the order of bans and picks, so that you don't always ban first and then keep on picking, I actually think that would require more strategy than hidden pick civs, but wouldn't ban mirror match-ups and wouldn't give too many civ wins.