You can use this power to absorb alpha strikes for your team. It's not tanking, but it's something.
With the other powers in the set, you can use your Bubbles, put up Dispersion and Dampening, lead off with your Force Bomb, and then hit this to avoid retaliation while your teammates attack, with all your buffs still on them. Then after controls and aggro are established you drop the force field and join in the attack.
But I and others have made suggestions of how to make it better, still it was left alone in the recent update. Hopefully it will get another look in the future.