If you use the switch I show in post 2 all you see is a brown bat handle with any single gang switch plate you would like. I am not suggesting mounting a NEMA1 fused safety switch on the living room wall.I understand the reasoning for the disconnect and I'm in agreement with you. I think a problem starts to arise (in a residential situation anyway) when you have to install an ugly looking disconnect next to a very neat looking AHU. It's one thing to locate a disconnect in an attic or a closet but quite another to put a big ugly switch on a wall in someone's dining room.
Beyond that ... well not my problem if they customer does not like the code and or manufacturer required parts.