Agree wholeheartedly. I am not a DC expert but I am pretty sure I could name 50, 75, maybe even 100 DC characters more well known than this one. I can see this made to order edition size being like 100 (and the only buyers being HUGE Green Lantern fans).
Well this whole 1/6 line by XM is from Rebirth and she's been a big part of that so it makes sense. They've already said they'll follow it with a more classic line so that is when you are likely to get more well known Lanterns and other characters.