i'd imagine a main reason why there's no sequence-saving/copying feature is for consistency's sake.
e.g. "saving" doesn't even make any sense for tombola.
Sure it does. You might have built a little scale there, found some perfect parameters, and want to use it again in a performance, but then the exact order and initial timing of adding the notes is difficult to replicate.
What happens when you copy your long Endless sequence, with sustained chords, into Finger?
it adapts the Endless signature to the fixed one of Finger and fills in the notes, up to the maximum length the Finger sequence will allow, transfers shuffle and hold settings, discards things it cannot translate.
What happens when you copy your complex, multitrack Pattern sequence to Endless's 4-polyphonic limit (if I remember correctly)?
It sets the Endless signature to the fixed one of Pattern, then fills in the notes starting from the first note in Pattern (not the start of the loop), prioritising polyphony from the bottom, up to the maximum poly limit of Endless.
(No paste from/to Sketch, but why not an ability to load/save?)
So the OP1 is limited and already does things in its own opinionated way. Above, I'm simply suggesting that it's possible to handle these cases, and you can see it remains opinionated and limited. These are not missing features, they are nice to haves, but they enable creativity on this device, and when a pathway is blocked, it attacks your creative flow.
I can't think of a designer who wouldn't love it when their product is used creatively in uncommon ways, which it accommodates. Blocking creative pathways is a bit of an excuse, and looking for reasons to do it is probably even worse. "Sense"
does not apply to the music world.