Chiming in 2 years later to say “yes, please” to notes!
I understand the limitations of the unit itself are probably the main reason this hasn’t been implemented, and offer a possible solution, albeit not the most intuitive. You could add an annotation feature to the midihub editor that doesn’t actually pass the notes to the midihub. The notes would be stored in the editor file only. You wouldn’t be able to see them when Loading from the midihub, but every patch I put onto the hub I save and title first, so I could just load my saved file to see the notes.
Perhaps not the most elegant solution, but it preserves the current functioning of the midihub itself, and I would welcome the slightly awkward workflow for the ability to annotate patches ASAP.