I love crowe, I will admit he usefulness is questionable sometimes but if he get into close combat he is just plain amusing. I have had him cut strait through horde units. A tip, you can always not
use cleansing flame when crowe charges in and just tie the unit up only to murder it during your opponents assault phase.
A nid player I knew was bragging about how no HQ could take a brood of genstealers, crowe accepted that challenge, and won.
Its getting him into CC is the hard part...