What if Nomi died?
So do you remember way back in season 1 when Nomi almost got turned into a drone. If she did Sun would still be in prison and probably dead, killed by her brother. If she did Riley in the end would die and/or become a drone and never meet Will and fall in love. Will would never meet Riley or save her at the end of season one. The others would be less directly effected but still hurt in one way or anouther. I can imagine that losing a sensate in a cluster so early would effect the cluster in someway or another. I imagine Cepheus wouldn’t be able to finish his speech (you know the one I am talking about) and would make office and would never be able to help his people. Wolfgang in the end would have died which would of broken Kala. Lito would might never of come out and lose hernando. They were so tightly knitted that losing one would have had crippling consequences.