Change fixture type with compound fixtures

The way change fixture type works with compound fixtures currently is infuriating and a massive step back from what we previously had.
last week for example I had Mac Aura's extended compound. Changing type to Robin 600s for one show. I selected the aura's and . to get the standard part of the library, changed type to Robin 600s, but had no programmed information transfer across
I also forgot that a new fixture number is created rather than replacing the existing fixture numbers which seems completely unintuitive
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