Right now, the winner is the best climber who can TT well enough. Take out TTs and the tour is a measure of he who has the best watts/kg.

You want the road to decide the winner, then you want mountains, extensive TTs, 5 man teams instead of 9, and hard, single day classic like stages where you cannot hide in your team shell and wait on the mountains to decide everything. That'll get you the best all around racer, not just the highest watts/kg that you get now.