There doesn't seem to be an advantage to getting another farmer. They get in a race condition where they try to go for the same apple (even when there are multiple), but only one gets it. The limit is still mostly how many apples you produce.
Speaking of production, the trees "Growing" moves them up, and away from sprinklers that might have been right next to them, eventually out of reach entirely and not automatically watered. These are wandering trees.
Speaking of sprinklers, the farmer trips over the water? Seems like it's just clicking around the area. Constant tripping.
Speaking of area, it was not at all clear how LARGE of an area the fire would eliminate (half the screen). It's not a precision tree removal at all.
Speaking of precision, where the heck are the sprinklers going to be placed? I tried several times to place one and it didn't appear, only for me to realize that every time it ha been placing them down ONE TREE AWAY (where the farmers were, hiding them). Also, no way to get rid of sprinklers? Not that I want to lose half my screen of sprinklers either though.
"Protein bar" (even though that is clearly chocolate) appeared to affect every farmer I had. But not any new farmers that came later.