I bought this game, and still play it, for its relaxation (with AT LEAST timespeed mod, otherwise i get stressed out again), and use mods against crows and lightning(to break anything on my farm, as it still does hit lightning rods), as i'm just having my time, like i had with Animal Crossing, so i wouldn't like this to be forced(as in, not mods, but everyone gets it), unless it's some kind of Hard mode, indeed!
A hard mode would've been already funny to see, but since players made many difficulty raising mods, i'm not sure if it'll be in the original game itself.
I'm sure most people play the game for its relaxation, so i doubt there's a high request rate for it.... but could be fun to watch others play with such things.
So even though i wouldn't like it as standard addition, i wouldn't mind seeing it as optional mode. :)