What’s the idea?
I think MIDI setup (or CV/Ext Midi/etc...) should eventually have its own dedicated landing page per track. As MIDI handling will becomes more flexible and complex, it makes sense to separate it into its own clear interface for setup and routing. So my previous suggestion about Midi Parameter Lock will be obsolete.
Where would it go?
New page or Seq sub Menu (like the piano roll sub menu)
Any details or mockups?
Optional: Add mockups, reference links, or extra notes to help us understand your vision.