|Proving Grounds Entrance|
What is the Proving Grounds?
This instance should see a lot of interest given that it will be a low-stress environment (no equipment durability loss, no worrying about keeping other people happy, etc) that will enable players to get better. It's still going to be a lot more fun to play with other people, but, sometimes there is a place for a single-player experience that still has a group-vibe to it.
Some have suggested that this is an attempt by Blizzard to gauge player's interest in the solo-instance experience (with an NPC support group). As WoW continues to age and continues to intimidate new players, allowing for varying game-play styles will only help to keep more players happy in the long run. Hopefully the balance will be such that it will always be preferable in a min/max setting to group with other players, but that you can still have fun (and experiment a little more) in the solo environment.
Good Luck getting the best score in the Proving Grounds! May your Endless Proving Ground mode adhere to the spirit of eternity.