agreed, in a world without fractal (mitosis' one per turn may be a bit more stomach-able) this would be a great idea, but with fractal it becomes a bit of a monster, lets say you generate 5 with a fractal, not optimal but manageable, will produce 5x6 hp for 5 air and 9 aether, then produce 25-30 air the next turn, which can pump out 3-5 potent cards.
i think boosting the cost to 2 per, that would change it from a 14->25(30) conversion to 19->25(30), a small adjustment but i think it would be beneficial, if it seems like too much of a nerf, boost the atk to 2. my 2