Replying to each submission is very impressive! Looks like last year you had ~24 speakers, so I assume you had ~100+ submissions. That's definitely dedication!
Have you run into speakers responding negatively to your (constructive) feedback before?
Have you run into speakers responding negatively to your (constructive) feedback before?
I like to think that how we message the CFP and how we manage the process and communication with submitters decreases the chance of people being overly upset with the outcome.