As mentioned above, Bullard did say QE is a more direct, and preferable way, for the Fed to act (given nominal rates in the zero range and forward guidance as the other major tool), but said he sees asset purchases affecting labor markets in the same way as interest rate moves.
Last week, the Fed released minutes for the mid-October FOMC minutes where they agreed to analyze the possibility of enhancing or replacing their current forward-guidance for zero-bound interest rates.