One thing I just realized--this is the first Marvel Netflix show that hasn't split up the POV significantly. DD had storylines for Matt, Fisk, Karen, Ben Urich, Foggy, Claire, and Frank Castle. JJ had storylines for Jessica plus Simpson, Trish, and Kilgrave (also Malcolm? Can't remember). LC split its focus between Luke, Claire, Misty, Cottonmouth, and Mariah.
Iron Fist is almost all Danny; Colleen and Claire fold into his story with very few deviations into their own shit. The Meachums do have their own storyline, although it's really Ward's; Harold is Ward's foil and Joy provides the stakes. Their side of the story is also nowhere near as textured as Kingpin or Punisher or Cottonmouth/Mariah. In fact, it's difficult to tell what purpose it serves thematically.
I have problems with all of the Netflix series, but DD and LC gave me lots of characters and storylines to care about so it was easy to overlook their flaws. JJ didn't offer as much variety, so it was harder for me to do that. But IF really only has two storylines running, and they're not very good. It's a lot of pressure to put on Finn Jones. An unfair amount, to be honest. I'm not the biggest fan of Mike Colter's portrayal of Luke, but he has a superb supporting cast with their own plotlines to pick up his slack (he's also very likable, which I don't find Jones to be). I'm guessing a lot of IF's problems would have been alleviated had the writers given characters like Colleen and Madame Gao subplots of their own.