The reason Vitality was removed from damage calculation isn't because SE wanted to nerf tank damage, it's because Weakness/Brink of Death no longer affect Vitality. The problem is an oversight.

Yes, there is a problem with the fact that right-side gear no logner contributes to Attack Power unless you meld STR or use 270, which are still hard-capped. The problem isn't particularly huge right now, but as item levels keep growing, it becomes harder and harder to maintain hate as the gap between tank and dd damage keeps increasing, and our damage directly affects hate generation. And before you give the "Tanks aren't meant to dps" excuse, keep in mind that healer damage does benefit from right-side.

The solution is to simply put more STR in proportion to left-side gear, so it makes up for the loss of attack power from right-side. MErely increasing the multipliers doesn't solve the problem with proportional hate generation getting worse as item levels keep increasing.