What do you mean? I think the amount of backstory content we have been getting so far is perfect for a visual novel like this, it really helps flesh out the characters in the game.
If the game didn't have the "super loooooong" backstory, I'm pretty sure I wouldn't feel as invested in the story and in the characters especially like I do now. So I think NiiChan is doing a great job in that regard so far.
However, I do have to agree with you in regards of the H-scenes. These type of scenes are one of the things players look forward to in an adult game. They're sort of like rewards, just like those unlockable secret images but bigger.
Yet the ones we've had so far have been lacking in a way. It's not that they're bad, it's just that it's so short that it leaves players wanting, most notably after heavy story contents.