Opt is worse than Serum Visions. Serum Visions is close in power level to Preordain. In fact, Serum Visions can occasionally be better than Preordain in instances where you prioritize setting up your draws over digging. A format like Vintage takes advantage of Preordain more because the difference in card quality between your best and worst cards is vast. Digging deeper to find your best spells is better than making sure you hit land drops. Serum Visions I have found to be much better in formats like 1v1 Commander and Duel Commander where you want to see what you draw first, then sculpt things going forward. Do I need lands or spells at this time? That is a question Serum Visions answers even better than Preordain since you gain the information first.
But it is only because Preordain is banned in Modern that Serum Visions is played there. And consequently, because Serum Visions is legal, I don't believe Opt will replace it.