Oh, I dunno. I think D.L. was important enough while he was alive, and last season his niece had a big enough role. (Whatever happened to her, anyway? Or Mikah for that matter?)

I think Maya is fine doing what she's doing. Last season she was there to give Sylar a potential victim. She's probably better now that she's with Mohinder. She never wanted her powers and wants to get rid of them because she considers them a curse, so she stays with him in hopes to find a cure. On the other end, there's Mohinder (who is also a visible minority, remember), who considers powers a blessing. Now he's finding them to be a curse, much like Maya. I think they work pretty well together. He needs someone there to watch him as he goes crazy. :P