I think some people are missing the point, it's not really about the numbers tanks deal, even with full str they shouldn't be doing more than a dps but atm with full vit a good tank will do about half of a dps, if that's what the devs want then fine. The issue here though is that it'll inevitably force us to stay in tank stance and the actual challenges of tanking (and healing) come in when you try to maximize your damage while still performing your main function, if you take that ability to optimize away then both roles become quite bland since the mechanics they have are still built around doing both rather than exclusively surviving,building hate/healing.

If people want pure tanks/healers than the mechanics have to change to make those things rewarding because anyone who's played either for an extensive amount of time will tell you that mitigating damage, holding aggro and keeping everyone alive is the easiest part of said roles.