She is not a risk reward champ. Her range and/or windup always put her at a risk but the reward is often not there due to weak scaling or missile speed. She's a capitalize on stupid people champ. A pub stomper. Stop being slow to awareness and you'll have nothing to fear. The only way vs a good team that she's going to be a monster is if your team is very coordinated, and by that point you have much better options for working with a competent team (like Thresh).
Have you watched any LCS lately? Especially EU. Nami's become a very popular and competitive pick.