I trust that the reasons for the crash are found, and I would suspect some overlooked deficiency in the design.
When all's said and done, the design dates from the early 1930's, when a lot still had to be learnt about aerodynamics - and even during WW2, the learning curve about aircraft design was still steep.
So much of what we know today was gleaned from vast amounts of aviation and aerodynamics calculations, construction, testing, and trial and error, during WW2.
I doubt whether any period in the last 120 years has added so much to the aviation knowledge base, as WW2 did.
Out of WW2 came jet engines and our modern aircraft designs, and the only real gain in aviation knowledge since WW2 has been from supersonic aircraft, and the development and massive expansion of electronics.