I've had WFA certifications continuously for about the last 10 years, and while I will say WFA is valuable, NOLS has removed a lot of content from WFA - some of the more useful things formerly discussed or taught in WFA are now only covered in WFR or WEMT, including how to re-seat a dislocated shoulder. WFA now only advises slinging a dislocated shoulder followed by immediate evacuation. I actually don't recall whether WFA teaches focused spinal assessment specifically any more. I don't believe it does. They still teach splinting and handling shock. I would strongly advise a separate CPR certification - and not one that only teaches AEDs, one that still teaches chest compressions and rescue breathing.
That said, I have used WFA training to save two lives in the backcountry - both for rapid-onset High Altitude Pulmonary Edema. While responses to altitude injuries are not specifically covered in WFA, the patient assessment system and the ability to clearly communicate patient status to rescuers, plus the problem-solving skills WFA teaches, were essential to coordinating live-saving rescue for each of these victims who were unable to walk themselves out. If you plan on traveling in the high country, then some independent learning about altitude sickness is essential. I also now carry a stethoscope and a pulse oximeter.
I would also add - a Garmin InReach type two-way satellite messenger device is now standard equipment any time I may be out of cell phone range. For $300 and $12/mo it was an investment well worth my family's and my peace of mind. I have been in a situation where I and my companions were delayed in checking in with rapidly deteriorating weather, and by the time we got out of the wilderness into cell phone range, a helo was spinning up. Had we had an InReach we could have remained in contact with family - without it, had we been delayed even a few more minutes, the helo would have been in the air and rescuers could have been at risk unnecessarily in high winds, swirling snow, and approaching darkness in mountainous terrain.