I feel there's a difference between "here some skills, so you can help with certain dps mechanics and output more damage when necessary" and "I need moar dps! 20k crit fell cleavesss yess, give me moar numbers!" mentality from some tanks.
The problem they're going to continue to run into is that if you give people tools, a segment of the population is going to try to be as effective as humanly possible with those tools. The only area for actual meaningful growth they give tanks is in their personal damage. DPS stances, a boatload of DPS skills, that they decided to 'fix' WAR by adding them to the "will never actually want to use threat combo" pile. The only actual way for tanks to improve and, like, do anything with the toolset they've been handed is to focus on their DPS.
Which they keep adding skills to emphasize, and then doubling back to remove the damage because lolbalance. Mitigating damage hasn't evolved, like, at all. Tank DPS has.
As much as dmg reduction is way more useful than VIT is, dosn't mean HP is not important to survavility. I've seen tanks with already several thousand less HP with STR acc. Those numbers matters and is only going to get worse.
STR vs VIT does not matter in practical terms for anything in the game outside of, maybe, week one world progression on a raid tier. Even in the biggest gear wall fight the game has ever seen, once tanks had a few raid pieces on the left side they started dropping VIT for STR because extra VIT is useless. Much like accuracy, VIT until you hit the minimum threshold and every point over is wasted unless you can definitively save healer GCDs consistently with VIT stacking and afaik there's no way to currently do that. There is nothing in SB that throwing more VIT at will help currently, and the absolute earliest we might even see something tuned that close would be the 4.1 super savage patch, where they could literally tune tank busters to only be survivable in full fending BiS. And even then, we probably won't, because that makes it not a gameplay mechanic, it's just a gear check.