Question: why are (roughly) 70-90 realtime hours to long? That's in real lif almost 3 to 3,75 days. That's just nice and not to long!
The game will take a while in spring and summer. And the game will also take a while in autumn and winter. Makes the experience of survival more real.
It's maybe possible making it so, if the serverowner/player wishes, to set ingame day, month and year. So the original implementation can be choosen but the default setting is the new implementation.