I think the mistake you've made is thinking that older fans don't like action based combat also.
It's not a one or the other thing, both can be good when executed well. Turn Based can be awful when it's just mashing attack over and over, and I didn't like the combat in 15 at all, but VIIR was probably the most fun combat for me of any FF game.
It doesn't matter if it's turn based or action, what matters is how it plays.
