Is the sudden popularity of Nami in LCS showing that she needs to be nerfed?

I have personally always thought that has always been too strong, when the meta allows. Aside from early game mana problems, once she gets some mana regen, she becomes more annoying then with an excellent CC that keeps her perfectly safe and her ultimate is far more impactful then a lot of support ultimate in the game.

So should she be nerfed?