War crimes aside, you have to have some basis to rate accomplishments.
If you want to throw out a qualification then it should be
SUNK.
It does not present to be finite yet gives the perception that it is. Sunk should be changed to damaged status.
Just replace permanently sunk vessels with destroyed. Then we can argue about how much damage, how long did the damage take to fix, if the boat was damaged just before a big operation how much significane did its loss hold, and yada yada yada.
So Mush,
Make your own criteria and send it to the Navy.
Who knows. Maybe they will scrap theirs in favor of yours.