Not having a wheel dished in the rear can have advantages. Some add a spacer on the Non-Drive just for that reason.

Plus is Less Spoke breakage.

The only real problem you will have is the rear caliper. It will move to the far left and you may have a problem centering it. For my 35yrs at this. You want it to be as close to center of your Brake Bridge {where the caliper bolts into.} For this is the part that really counts.