It actually happened to all products but the Arduino Shield.
The Footswitch was conceived quite recently when compared to the Expression Pedal and most of the changes were releated to construction, once we found suppliers that offered better solutions that we had in Brazil. Albeit still a sheet metal enclosure - and not DieCast aluminum as the MOD Duo - the Footswitch will be constructed using the same "Top Single Piece Container + Flat bottom cover" as the MOD Duo. We'll have images of the samples soon.
The Expression Pedal is whole different story. The original design had lots of flaws, from conception to construction, and thus has been enormously redesigned.