The low production all year points to something other than molting.
I'm guessing low nutrition.
Fewer poops means less eating.
Just went thru this with a bag of older feed(3mo, had no choice), fewer poops, less water consumption, and fewer eggs.
Got fresher feed and things picked back up, even with older birds in the shortening days.
ETA, but I also feed a 20% all flock and no treats but a touch of scratch.
Are you feeding any 'treats' or foods other than the layer feeds?
What are the protein and calcium percentages of the feeds?
Are the feeds fresh, do you know how to check manufacturing dates??