Coach are you crazy? You want me to train kicking for a 1.2 or a 2.4 mile swim! Yes, yes I do. However, I do not want you to use much of your legs during the actual race. Save them for the run and the bike.
I have seen Triathletes move backwards when they kick flutter/freestyle kick. This does not mean stop kicking, it is an opportunity to improve in the following areas:
Training kicking will help increase leg strength, stamina and endurance. Then when it is race day focus on an easy relaxed kick, you will get out of the water with additional energy feeling fresh for the bike and the run.