mbrown3
Inspired
I get what you're saying and if I'm correct you're probably thinking about something like the Nova System or POD or such units that have dedicated guitar inputs. These are multi-effects units. The MFC and the Kemper Remote are dedicated midi controllers for "nothing else" than sending MIDI messages and controlling the device they're hooked up to. Introducing audio there would just complicate things and make them outrageously pricey without any real benefit other than using a tad shorter cable.
Fair enough. Note that my question wasn't a complaint; I'm genuinely curious as to why this hasn't been done, especially in all-digital rigs.