Quite simple to do indeed but probably (as usual) several ways to achieve it 🙂
– you can work with tables using key, values pairs
– you can work with simple classical tables with index 0..n with 1 table by param
– you can work with simple classical tables with index 0..n with 1 table by pad
Once this is chosen, I would also define some kind of sysex file structure to load/save on disk then I would handle everything with memory blocks.
As Lua is quite fast, switching pads and displaying values is immediate.