When you dont have enough labor and you hover over the tool tip/ui its says needs 49 peeps for Labor… It should always tell you when you hover… Please make this lil change would help when planning what your building 
i love how vague it is… like u either have enough or too little labourers that supposedly affect efficiency? … but how? what do they actually do? i need more details what difference does it make it i have 2 less than recommended ? what are they actually doing? why do i need x number? …