What exactly is the issue with A319/320 if the E295 can get in? They are both within one meter of wingspan and the A319/320 is 7m/4m shorter than the E295 - and, for that matter, the A319 is even shorter than the E290)? While the A320 may struggle performance wise, the A319 has hot rod capabilities that are used to good effect elsewhere (China, Bhutan etc.). is it "just" the weights?