My feedback on "Reap what you Sow" - Lack of "real" threats

First of all, I just want to say this update is FRICKING INCREDIBLE! Great job, Klei!

But here come the things I have to discuss:
Farming's Threats aren't really threats - I'm not including fruit fly as of now because it's incomplete, but I'll update this as soon as I can when it's there.
The only real threat to your farm is Forget-Me-Nots, that spread very fast, and can easily over-take your crops, but all other weeds are only there to hurt you, and doesn't influence regular farming(not large crops)
Another thing is the nutrients and watering system, they currently only work as a requirement for large crops.
My solution is:
Make it so plants can die if they have too much stress (I was thinking 5+ but that's up to be decided), Weeds, lack of nutrients, debris and incorrect season all apply stress to plants, however, as of now, that only affects you if you're farming large crops.