sorry to hear of your DW's accident. You should have your TA contact the cruise lines special services department tell them that your DW will be in a wheelchair, they will be very helpful.
The common areas are fairly easy to get around. The only problems you may encounter is that the hallways will only allow for one-way passage with a wheelchair(they are a bit narrow). I am not sure if a wheelchair will fit thru the door to your stateroom, If she can maneuver with crutches i would bring those.