It will accidentally happen when clicking around slots for a while.
This will break the mental song structure
2b) Especially with aliases, as an alias that was intended to point to a slot will not update accordingly (Renoise doesn’t know what sequence you intended as a “mother”).
I’m not sure i understand the feature. Maybe it could be filtered with a control key?
EDIT: Doing a pattern wide operation on the basis of a slot doesn’t seem logical, at least not if it happens easily by accident.
Well, ok. I hope this won’t derail into that flat-sequencer war thing, though… But for starters: I suspect there must be some technical reason for doing uniques of every copied pattern? That would explain the quirk 3 -vid thing. I can’t really see what that is, unless it’s about the speed of which the copying is done? That you could skip checking if it is actually necessary to do unique patterns instead of just the amount needed. I don’t know. I’m probably missing something here.
As for quirk 2, I’m also a bit stumped on why the first pattern needs to be uniquified. I’d very much like to understand that one. As to uniquifying of the second pattern, it must have something to do with the explanation of that quirk 3.