I have to agree with pokemaster12. A lot of the women in the pack disappear entirely. You show how Naruto gets together with said harem member, but once that's done they're gone entirely.
The last time we saw everyone together was the aftermath of Naruto's mojo problem and teh discussion to solve said problem. Granted, they can't all get away from their villages but a scene here and there with them would help.
As for Anko, I'm guessing that missing link could be Kurenai, but what are the odds that Anko might try to kill him if he decides to include her best friend in plans.
Hopefully, Naruto learns that each woman has to be handled differently.
Author's response
As I mentioned several times I have to disagree with this statement that characters disappear. They might not get a great deal of screen time but they are mentioned and they have appeared.
For instance the Harem gathered several times since the one you mentioned. They did when Kakshi was brought in on the secret of the Harem's existence. They did again just last chapter when Kiyomi discussed her making them ageless.