After playing an intimitank tower shield mobility build, i would love to be able to roll into enemies and do some damage however small, just so its not as mind numbing.
Post your ideas.
Mine: Spiked Helmets with damage range.
or perhaps it could silence or stun enemies using a DC formula that involves the tumbling skill, that would be pretty huge because most tanks get nailed by magic damage, not sure exactly how tumbling would achieve that though.