I thought JJ was a bit better overall, but do agree it was a bit too stretched out. The Luke Cage ending was entirely expected since the moment she knew who he was, I was yelling at the screen - go buy some fucking earplugs for him.
DD season 2 - Punisher arc was the best part by far; Elektra arc less so; and once ninjas show up it always hits super-cheese. Plus the NYC neighborhood thing is dead as doornails and has been for a long time. Nobody gives a fuck about Hell's Kitchen vs whatever except for if some new restaurant opens there. Most of the old time inhabitants are dying or bought out.
The real problem I think they are having is consistency under the MCU banner. For each "tier" of show they have different realms - DD and JJ are very local; fine, since they are running around being vigilantes in their home areas. Agents of Shield has this problem the most, they need world level threats that aren't serious enough for the main heroes to come in. And nothing the main heroes come in seems to impact anyone on the ground in realistic ways - e.g., Why would JJ have trouble convincing people of David Tennants powers right after an alien invasion?