Yes, there is no 'conspiracy theory' in seeing that we do not know all the information, that more will emerge over a longish period of time probably, and that it will likely be 'significantly different / more complex than the information we have been given' as MerryMarigold says above.
I also agree with GarlicMarchHare's remark that there have been many 'hush-ups' over the years, many, many, many, and these are just the ones that have come to light.
Whether this is one of them or not, remains to be seen.
It sounds as though Inmarsat, Cranfield and the AAIB have been working very hard to process all the relevant data.
I thought the Press Conference was quite dignified this morning but they did look very uncomfortable a few times and there was a definite complaint about 'wrong information from the Chinese' holding them back in the search which I thought might be indicative of problems 'behind the scenes'.