A swiveling passenger seat is nice to have as long as your floor plan can accommodate it.
Our passenger seat shown here, the seat belt/air bag detection wiring happens to have enough length to accommodate the swivel motion. We generally swivel the passenger seat when we have guests inside while at a campsite. But we don't bother when just the two of us.
Our dinette prevents having a driver swivel seat. By luck, the front dinette bench makes a perfect ottoman for the 3rd seat. Adjust the seat away from the wall, closer to the dinette, and it's perfect.