If its just the 2 of you probably not a downgrade. It would depend on if you are wanting to be one if the in group and have visitors in and what not then a small a would probably be a better fit. We have 28ft B+ but its only the 2 of us. It meets our requirements for the travel and convenience and we do tow a car. I drive a school bus so I did not want to think of fun and cl a as fun. Plus we would have storage issues that we dont have with the smaller c/b+. We have 2 slides the dinette and the beroom, yes it would be possibly better with 3 but why? We looked at a couple and they were nice but when closed up! With ours we have stayed with friends on the streets with no issue, could not deploy the slides but that was still ok. one neighbor of a friend said to park in his driveway they were in the process of moving to a new home so we did. also stayed in driveway of inlaws when visiting with them, with slides open.
So a smaller c or B+ in our case makes sense. The storage issue is one to think about but then you adjust and carry less junk! We have bays dedicate to certain items and still have some room, nothing for large outside patio items like chairs etc, but we make do with the foldup/rollup chairs and a small BBQ.
We chose the B+ for aerodynamics, just like the big rigs. We had a cab over camper and it was a big sail so unless you need over cab bed consider 1. Some do not have entertainment centers and there is some storage room there.