It's very weird - as presuming that there was a catastrophic event at 35,000 feet then they should have found something by now. If there wasn't a catastrophic event at the point they lost contact, then it's even weirder IMO, that ie a hijacking could have taken place, disabling all communication from the aircraft, dropping out of radar and crashing somewhere else. From the POV of a "terrorist" doing that if the purpose was to crash the plane - then why bother?
Human trafficking - red herring. The fake passports may be a red herring. No doubt despite lack of reports, there will have been plenty of loonies fronting up already claiming responsibility for a bombing - and only one or less can be verifiable. There will be gag orders in place, and with many possibilities open - a lot of checking to do. 239 POB was nowhere near capacity - so presumably it could have been carrying some cargo.