Okay, for one, this show is literally a toy franchise for little girls who's been going on for several seasons now. Baby plots tend to have the same result and for hells sake why does it matter?
If you don't like Princess Flurry Heart then big whoop. It's not the end of the world that there may be an OP alicorn baby. There is the off chance that she cant control her powers. Hell, you have a bundle of tiny foal with a MASSIVE amount of power in her. It's no surprise that she WOULD have little to no control over what she's doing, or any sense of right and wrong when it comes to how its use.