Yeah, strictly speaking I don't see extra ranks in parry/reflect as excessive.
1: It's per attack. Throw enough attacks at someone and they will have to use it multiple times.
2: It costs strain. Combine with the above and keep the action moving along, give them a long action scene or face against something with linked 3 (Grevious, autofire weapons, multple squads) and then they will have their challange.
3: It's possible to disarm them. Then parry/reflect won't apply for following attacks.
That being said, it's dependant on situation