Mross, it would help to maintain your skills but it would not be ideal because you don't feel G's in the sim.
Also, I get sick using the visuals (the fake stuff out your window) in the sim because motion sickness is a disconnect between what your eyes and your inner ear tell you, which do not always agree in the sim, like when you're taxiing and you make 90 degree turns etc.
You can get enough practice, assuming you fly enough legs per month, hand flying on the line, EVEN with your flight director on IF you work the throttles manually.