Exactly!
Imagine a grey sentinel or maurader with a red and a blue saber in his hands... only possible to the grey jedi who has neither achieved Dark I or Light I.
Also, Revan is a perfect example of a Grey Jedi. Its rare... but its fun to play something other than LAWFUL GOOD, CHAOTIC GOOD, or LAWFUL EVIL, CHAOTIC EVIL... adding neutrality to the game will allow us old pen/paper D&D veterans to play a LAWFUL NEUTRAL, TRUE NEUTRAL, and a CHAOTIC NEUTRAL player and not be penalised by that choice.
Looking forward to neutrality when it comes.