I think any ship or tech design we do should firstly represent the job it's going to do and the tactical challenge it presents to the player and once we got that nailed, turn to its looks. Sort of a function over form to begin with and then concentrate on the form.
Not to put the aesthetic down, quite the opposite the ufo's have got to look amazing as they represent the shiny new alien tech the players will want to get their hands on
I don't know how everyone else feels about this, and it's something we're going to have to look into along with the backstory of how ufo design fits into the story. Anyway to fire off the discussion here's a concept of a medium scout using Breunor's pentagons
I apologise the design isn't to scale or even the correct dimensions, it was just a quick sketch