Something along those lines might be in the cards for Android L, and it concerns the revamped Quick Settings panel in the new platform. Posted on the official Android previews issue tracker, a user is asking for the ability to actually customize the menu -- something that has been possible with custom ROMs for a long time. Thankfully, an Android L project member was receptive, and the suggestion has seemingly been elevated for consideration. And that makes sense -- as the user who submitted the feedback says, we all have different needs, so for some having quick access to Bluetooth isn't as important as, say, internet data controls.
Of course, do keep in mind that there are no guarantees that the pull-down quick settings menu will, indeed, become customizable. In fact, Google has been pretty conservative with adding seemingly empowering ideas in their stock versions of Android, for good or bad. That said, we'd certainly like the option.