The big issue is creature spam decks that don't care about mass sacrifices late game, it causes problems in stallbows to be pumping out multiple of these a turn at next to no cost, then drawing 4+
If played early game, it costs what Precog does to draw into combos fast, so it's far more powerful because it's stronger later, while as powerful at any other time.
Monos can pay a higher cost because they only produce 1 type of quanta in larger quantities.