I'm just going to be fairly blunt about one thing that I see here and often mentioned as an idea for WAR utility.

A raid-wide dps buff as a utility ability for any tank would be OP and make them immediately the meta choice, making them mandatory.

The only way this wouldn't happen is if they all were given one and then at that point we are equalized and back the the same situation.

Direct DPS boosting is just too valuable to a group to be considered for raid utility.