The problem is that, in most decks, Harnessed Lightning kills four-toughness creatures at instant speed, and in black decks, Grasp of Darkness and even Fatal Push offer the same power, so it will take a pretty specific build (a deck that doesn't care about energy, doesn't want a Lightning Axe package, and isn't playing black) for a deck to really want Cut // Ribbons over the other available options
(If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.) Once a creature becomes monstrous, it can't become monstrous again
The problems arise when you realize that attacking with a 3/2 is hard, but sometimes youll get enough value
Before we get into the identity crisis that Orzhov can sometimes face due to social contracts, largely I want to talk about another aspect that hampers Orzhov decks in practice: sequencing
Fewer copies exist
You do get 12 boosters in a box which may seem less than the Draft and Set boosters, but you are expected to open higher value and exotic cards instead