[i noticed a couple of things ... That leaf droop , did you just water them or is a dry soil ready to water ?
This is one symptom of problem , the pale yellow mid leaves look like boron deficiency but that should be in FF nutes already. I'm still banking on PH problem either soil or water. Are you using full strength or lower amount.?
Remember less us better. FF NUTES ARE VERY STRONG !
Start with water only for now , allow plant to adjust to no more nutes right now. Look at your new growth ... Is it ok or is there issues ?
Watch plant for awhile and see if rest of plant looks like it is getting better. I probably wouldn't pull leaves off because plant is stressed. I would keep water only for week to see how plant does without feeding. When plant revives you can cut leaf across knuckle to "cripple" that leaf so plant doesn't waste energy on trying to revive that damage . Cut leaves are better than pulling for now as plants continues those bad leaves will die off and be ready to pull ( crispy dry ).