When a ship is dealt a faceup Damage card, assign a critical hit token to that ship as a reminder of the card’s ongoing effect. That token is discarded if the card is discarded or flipped facedown.
I think Critical Hit Tokens are redundant, and add more clutter to the game than their given reason for existing warrants. I think they should be optional - since they serve only as a reminder that there is a faceup damage card associated with the ship in question.
I don't doubt that some players have a story or two about how these little card board tokens have helped them to blah, blah, blah. I say that the benefits (perceived or actual) are found wanting in the balance when weighed against the clutter, and the time wasted monitoring/managing what amounts to an entirely redundant bit of clutter.
I don't mind if an opponent wants to assign one of his or her own critical tokens to one of my affected ships - if that helps them - let it be. Let it be their business to move it around with my ship, and not mine. If they need that reminder - let them have it - but if I feel the faceup damage card is sufficient for my needs, then let that be too.
I am sure there are some really good reasons to have these tokens, but I am also sure that those reasons aren't good enough .
But that's me. What does the community think? Will the game fall apart without them, or be better off without them?