In the current meta of lots of large ships with ECMs this card could have been really amazing. The problem with the card in its current form is it's timing. Unfortunately its effect resolves after the enemy could already exhaust ECMs thus making MS-1 useless. If the card instead read:
QuoteWhile attacking you may spend a blue die with a (crit icon) to exhaust 1 of the defender's upgrade cards.
It would be an amazing counter to the overabundant ECM spam and make ECMs not an auto include anymore.
I think the card in it's current form may still have some overlooked value if paired with a Raider 2 or CR90 B to soften up a target but I really wish the card would have been worded differently.