I like the versatility of these units.  I noticed they can attack strike craft, at least bombers, as well as ships.  The attack run is much better than the units standing about in space and forces the attacking unit to turn, reducing the damage taken. These factors make corvettes an excellent early game escort. I did not notice these factors mentioned in the tool tip.  At the very least the AA capability should be noted. I would change the class to destroyer as they seem to more closely fit this classification, as least in historic naval classification.  Corvette is more of a light cruiser (hint, hint)