Iron Fist just looked like it had no unique angle to really pull from.
Daredevil has both urban crime/mob shit covered, whilst also having ninjas and vague spiritualism.
Jessica Jones has the detective angle, a unique female lead, and the stalker/thriller angle.
Luke Cage was another urban crime story but from an african american perspective, some crime lord politicking, with a bit of science-fictiony superpower stuff.
What does Iron Fist have?
Ummm white guy is good at martial arts? Oh that's Daredevil. Rich guy comes home to take control of company again? Oh that's Batman and Iron Man. Spent years learning skills in non-descript East-Asian country? Oh that's Batman again, or Doctor Strange.
I love Immortal Iron Fist as much as anyone, and that has some awesome stuff. But the approach to this show seems there's nothing that hasn't been seen before.