The Gorilla,
A successful flight test programme is a long way off yet, but a major hurdle has been overcome.
Virtually the only bit that remains of the original is the outer skin of the fuselage and I understand that was in good condition.
Your reservations about an Air Eng might be very valid, however I will be surprised to see this a/c having to descend to an operational height of 250ft, for the likes of photography, fishery protection etc. With an integrated and working EOSDS there should be little need to go down that low.
If data fusion is successful in an operational environment this will be an excellent Multi Mission aircraft.