Runed orb nowadays is a self fulfilling prophecy.
You generate a card that you actually need to use. So in other words it’s the same as not generate a card at all.
Be it another card to help remove something together with orb.
Be it spell damage to make the damage actually meaningful.
The fact is that 2 damage is so inefficient that all mage decks suffer by having a card that is supposed to be an actual pillar being actually inefficient.