Yes, it is very intuitive controlling the flash from the menu, isn't it? But if you do it enough times, it's very quick and easy to set the flash settings from the flash also, especially if all you're doing is change the A:B ratio (changing the A:B C ratio is a little more involved but not much more complex). But if the flash is connected to an off-shoe cord, then controlling the setting from the flash could get a little cumbersome, huh? 
There's this neat little gizmo that LPA design also makes. It's call the AC3. It sits on top of the MiniTT1 or FlexTT5 and with it, using three little dials, you can control the power outputs of up to three flash groups. Changing flash setting with the AC3 would be even much faster and easier than changing the settings via the menu.
With the AC3, you no longer need a master flash connected to the camera to control the lighting ratio. The flash can then be kept off camera without being tethered to the camera via an off-shoe cord. Of course, that also means that you'll need another FlexTT5 for that flash.