Did you finish the 2 completed paths (Elly and Good Husband) Plus the content for the other two known paths (Harem and Forbidden)?? Yes the Harem and Forbidden are similar in parts, but with the multiple paths there is quite a bit of content.
ALSO, the Dev needs time to produce a product of this quality. For myself I honestly LOVE the humor, VERY good Images, Story, and all the other little things that make this fun and SEXY. There are other games with humor, but I think this is one of the better examples.
No, I'd say that the Dev has given us plenty of content for the time involved. Some others produce more, but of course we also see less in some cases.
Just a thought.