I suspect that since you posted this in the Class A forum, that most folks will respond that they prefer the A (because they have an A, they're more likely to read the Class A forum).
As someone who has a small Class C, I think all the above points are valid. However, I think it really depends on WHY you and your wife are considering downsizing?
Do you not want to tow? Do you want to be able to go places that you can't easily take your A? Do you want the different floor plan configurations offered? Do you want an RV that your wife would feel more comfortable driving? Do you just want a change?
There are many reasons that downsizing makes sense and there are many reasons that downsizing doesn't make sense. What is best for you will be dependent upon the reasons.
Along with WHY you want to downsize, you need to look at WHY you like your current A. Do you like having your own space? Do you like having lots of storage? Do you like the "home" feel of the furniture and cabinetry?