I'm not sure if this is something that would be feasible or not, but would it make sense for QLC+ to be able to use/convert manufacturer's fixture definitions? For example, Chauvet publishes definitions for their DMX software and while it might not provide a perfect definition for QLC+, a conversion utility might provide a reasonable starting point while saving some time.
Obviously not something that would probably be high on the priority list but maybe something that someone might want to consider down the line.
Q Light Controller+
Official forums of the QLC+ project