I had a plant that looked like this from root rot in veg, and she was droopy and sad for like a week and all the big fan leaves were consumed, but eventually she bounced back and I flowered her and ended up with 2 oz of chronic purple buds. Being in flower and not veg, it will probably affect your yield quite a bit but she should turn around.

Oh, and for the one that all the leaves are burned up and dried, you might as well chop it. Without leaves, the plant can't process the light and its 99.9% likely that its not going to get any better from here.