Yesterday I switched my VIT Gear to STR Gear:
Lost 20% of my HP (drop from 10k to 8k) and only won 10% DMG.
Did a small testrun on the Big Yeti Fate:
Result: DMG can be still ignored but I lost 20% of my HP (no hate issues by players in my same range so same as before)

So I do not see why STR should be much better then VIT.
I also read some calculations that STR PLD can increase in endgame the DPS of the group by 100-200. Which means it needs (based on 4000+ DPS) 20-40 Seconds to be worth for one Second of normal DPS.

So a 360sec fight will be decreased by 9 - 18 Seconds by a STR Tank. These are 3,6 - 7,2 GCDs....
So if the data in another topic is accurate it is just saying: STR is still not worth. 9 - 18 Seconds faster per Bossfight will make it up to 1min in a normal Dungeon.

Either the theocrafting I found int this forum was wrong or STR is really not so much better then some people here are talking about.

Well I think I will use STR for leveling, fating or if I am really well with the group. Not to help the group DPS but to see bigger numbers on my PLD.