I think you are making it too complex. MIDI groups are meant to be used with a desktop controller (MIDI faders) for studio work.
Live playing is different. You can easily store as many different tweaks of any preset as you like. Storing your version is simpler than doing that.
Please check the MIDI Virtual Racks presets. They offer unique and advanced features with extreme semplicity. They might perfect for you.
best
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