at first..no but evenutally..yes
I'm not sure if you plan on cosleeping for a long time..that's the only instance where I can see you wouldn't need it.
I'm a light sleeper and we put DD in her own room at 2.5 months. It was life changing for me. Every snort, sniffle, and move, I was up when she was in our room. Once she went into her own room I slept so much better and the room got a ton of use. While she was in our room, the nursery was basically a holding place for clothes and diapers