Newest review on this is 5 years ago? Damn.
Well, let's see where we're at now.
Cosmo can use this with no penalty at all if you're playing Magik.
We have some more allies who get more value out of each attack like Dust and Two-Gun Kid.
We have Iron Lad who can exhaust another ally to add their matching power to his. Enrage Wasp, play Iron Lad, and he swings for 6 at a time while only taking one consequential damage.
X-men have Team Strike to use a bunch of allies at once without them taking consequential damage.
Cannonball can ignore the consequential damage from this if you have at least 3 aerial cards in your hand.
Fastball Special deals damage equal to the combined ATK of the characters, and it can now be recurred with Dynamic Duo.
It's not a good card to just throw into any deck, but it does have a lot more use than it once did.