Personally, I would have turned all the kop into a standing area, In its current form it’s a very poor seating experience anyway, and the shallow rake of the kop is not that far removed to when it was an all standing terrace back in the day.
I prefer to sit these days and the three other stands are perfect for that, but you’ve got to give people who like to sit down on the Kop more notice to move elsewhere in the ground…Maybe a one season relocation package, where they get a season ticket in another stand for Kop ticket price….Some will move, others will just stand