It's the same amount of content as the rest of his games, maybe slightly more, but it's spread across 6 girls instead of 1 or 2 that it feels like less. It also doesn't help that there's a disgusting amount of grinding you need to go through.
On terms of content, i'm not disappointed. In terms of grinding to get to it, I am. Now I just need to figure out how to get the rest of the endings after getting the "canon" one. Not to mention this is still a buggy version he released, admitting it's likely buggy as the ability to buy birthday cakes is bugged with just skipping through the convo for me, and some texts give error messages or cause my game crash namely talking to lily sometimes in the harem room.