Having ladders with periodical resets would give players another area in the game that would yield high drops, with good rolls, a lot more often. Which would get a lot more players involved. Setting up the servers the same as Hardcore (being separate from normal play) would be easy enough. It's just a matter of making changes to the lobby screen when making a new character. The actual game itself is just a copy or Softcore mode but without a RMAH. THe RMAH would be redundant but the GAH would be fine & could even be a place for those Flippers to see who can make the most gold.
I'm not asking for it to be implemented right away or even soon. (would be good) It would be nice to know though that there some intention to incorporate ladders in the games future.