The scary thing to me is if the two-men theory is correct these investigators will have a hell of a time identifying the culprits. I'm just thinking of the possible evidence that would exist in a case like that and it could be very little. The main lead would be what some shady stolen passport dealer in Thailand? And CCTV footage.
Obviously whatever networks they would have been involved in are not well penetrated by intelligence agencies.
Malaysia does scan fingerprints on arrival but who is to say that procedure wasn't bypassed also.
I'm just thinking of the wider implications, it seems to still be fairly easy to blow up a plane. Allowing myself to engage in rampant speculation to address an issue larger than the incident itself