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

[Ibi]

If SE is looking at Tank Damage calculations, it'd be because they don't like the Damage Results tanks are dishing out. If they were fine with tanks having high potential DPS they'd just leave things the way they are. In correlation they referred to hybrid accessories as 'exploits.'

Or it's because they don't like that Fending accessories are considered irrelevant. Or because they don't like that undergeared tanks are following the meta without understanding why, and it's causing DF healers to have to work much harder.

Also, I don't see the word exploit, or any kind of synonym for it, in their post.

No one thinks you should have vit count for hp and damage at 100% of their current scaling if not for the fact that it would nerf tank dps by an utterly miniscule amount across the board which a lot of people are bullheadedly opposed to.

I.e. 50 vit in 3.2 could give the equivalent of what 35 vit+35str currently gives.

They'd have to modify enmity calculations with this also, I suspect, or you run into an issue with this where tank DPS increases at only 70% the rate of DPS classes. Keep that up long enough, and even the best tanks will struggle to keep aggro.

All I wanna know is if I should be buying fending accessories or not.

We've got long enough between now and 3.2 that you've got plenty of time to pick up a set. It's probably worth doing, even just to have more options available in 3.2.