PvP ranks = best idea ever.
If D2 pvp was ranked, it would be more fun for everyone: New duelers wouldn't risk getting FLOORED by the pros; and the pros wouldn't be wasting their time finding an opponent worth fighting.
+ ranks are super addicting!
Right, it's always nice to see where you stand against your fellow teammates. With the new PvP arena system there's tons of options available. And you wouldn't implement a PvP arena if it wasn't an important feature of the game. I believe upon release it will be very basic until about 6 months into the game. Once there's enough feedback and great options in the air we'll see some progress on this end.