Simplicity. And it really does work well in this guitar. Even though I did add vol/tone controls to mine, in it's stock form it really is very usable. I ride the controls a lot with my other Tele's, so I wondered about it, too. But I used my Thinline stock for over a year and was good with it. The Fidelitrons respond amazingly well to simple volume control adjustments. Brian Setzer's signature Gretsch Hot Rod models run that same setup - one volume control and a 3-way switch. That said, I like mine even better since I added the dual controls.