I'm with the others too. If your wife is a safe driver and this allows you to continue travel and enjoyment, then by all means get her to drive. Rather than teach her yourself (which can always be stressful) I highly recommend an RV driving school. This will put the professionals in the chair with her and will give her more confidence in the long term.
Also, while she is driving there are ways to interact in a positive way. When hubby is at the wheel I usually pull out my Benchmark Atlas and talk him through the drive and local sights. It's interactive and fun. Your wife sounds like she likes to have feedback and interaction so maybe something like this would work?
I've learned to drive, dump, hookup and basically do everything on the rig. This came in handy last year when hubby injured his back and was basically bed-ridden for a while. I recommend every woman to learn what they can about their RV. It's just good insurance all around.
It may take some adjustment for both of you, but if it allows you to continue doing something you love it's worth it.
12 paws, 40 feet and the open road