Please Fix Siphoning Strike, It's Laggy

Ever since you remade Nasus his SS is extremely slow and laggy compared to his old one. Also, it is affected by attack speed slows. As an ability this is kind of odd, isn't it? It looks strange when laning against a lee sin or Malphite and they apply the slow. Siphoning Strike then slowly comes down on the minion.

Can you please revert these changes and make it quick like it used to be? Farming with him just isn't the same or as satisfying.