I might be misunderstanding you, but I am sending Program Change from the OT every pattern irrespective of the Part.[/quote]
You can send prog change on a per Pattern basis with the Audio sequencer.
The midi sequencer is per Part.
There’s a thread about it here, looks like it’s confused a few people, lol
http://www.elektronauts.com/t/midi-sequencer-programme-change/2115