It is unnatural to have interest rates close to zero and to distort the yield curve by pegging longer-run bond prices at artificially high levels and suppressing yields.
Considering that quantitative easing is effectively the same as an interest rate cut below a zero bound, the yield curve is very steep even with 10-year yields just below 2%.
Pegging the federal funds rate close to zero for another three years and twisting the yield curve to lower longer-term rates will continue to misprice credit, penalize saving, and encourage risk.