What they mean by "change the damage calculations of tanks"?

[Freyyy]

I think that there is a big big chance that we might see tank Attack Power scale with VIT. Fending accessories would be desirable again and that'd be cool. I don't see them do some weird shit like scaling with both STR and VIT with a 40/60% rate or whatever. It's FFXIV guys. Look at the number of different stats, it's laughable compared to other MMOs. There's 0 complexity in this game. Everything is straight forward and I think it will stay like that.

[Cynric]

I think that there is a big big chance that we might see tank Attack Power scale with VIT. Fending accessories would be desirable again and that'd be cool. I don't see them do some weird shit like scaling with both STR and VIT with a 40/60% rate or whatever. It's FFXIV guys. Look at the number of different stats, it's laughable compared to other MMOs. There's 0 complexity in this game. Everything is straight forward and I think it will stay like that.

That's also another good point that I agree with. This game is extremely simplified and they've made their intentions to keep it as simple as possible very well known. This is part of why I find it hard to believe they would do some kind of Str /Vit split. Might as well just make the main stat vitality over doing something like that.