First fem gen

Hey there if you look at the leaves they are all sagging ot looks like your starting flowering in these photos I'm sure it has todo with watering If not watering then you gave to much nutrients

Some bottom leaves without proper light or air movement can be canibalised/ energy redirected by plant, thats normal. Here i would bet more on wrong watering regime, aka underwater, soil build up, lockout or toxicity from this. Reduce nitrogen feed part for a bit, rethink how much and how often you water .

I wouldn't prune out any more than you already have. Looks pretty clean to me.

Your call, I don't think its going to do much and I would just leave them. Even if they are just popcorn buds, they will add to the total yield at the end and make great mini nugs to play around with in edibles and stuff if you don't want to process them for smoking. It looks like you have defoliated this plant quite heavily in W13, This is a no go IMO, in bloom it needs leaves to produce energy and make buds. With out it. you can't make something from nothing and just end up setting it back limiting its full potential. Defoliation has its place but I don't think it was needed in your tent. and in most peoples cases I don't think its needed to much or at all. more leaves = more energy = more buds The plants are looking good now, just be aware with the less leaves its going to be growing a bit different and keep an eye on feeds as not to burn the leaves you do have left. Good Luck!