I wouldn't mind trying but aren't there already established models for the UFOs/Aircraft?
Edit:
I also worry about my ability to make new UFOs in the spirit of the existing ones. I like modelling because I can express myself. I would personally be very tempted to do the UFOs in a totally different style (most likely something more biological looking, without being biological).
The idea is that such a design would come from evolutionary design. This is where a computer starts with a basic design and mutates it, picking the best new design by running simulations and doing this millions of times, ending up with machines that resemble bugs and deep sea fishes and things that look very weird to us but are actually extremely efficient. I've attached a concept I posted in another thread as an example.
And before I did that I'd want to do concepts and model sheets for all the UFOs in case another modeller wants to help out. It would be a big task but a fun one, I just don't think the community/core devs would be wildly enthusiatic about it. :/
Edit: Another great ship design in this kinda style, from the Fifth Element. Image attached.
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