Totally different circumstances. Sadly we know everyone on the Lion flight was dead within minutes of it crashing, MH370 disappeared in mysterious circumstances.
The FDR was found quickly, if "they" were trying to cover something up "they" wouldn't have found it. Just because you seem to want to believe something nefarious is going on, doesn't mean it is.
More excuses for all parties involved but one. We're now okay with "grading" the need to send the necessary search and recovery equipment based on whether anyone survived? The CVR isn't important enough to demand the right equipment in a timely manner (assuming that's actually the reason)? The WSJ reported that the search radius for the pings believed to be from the CVR was only 80 feet, and this was just days after the crash. And a month later it hasn't been found?
Because you seem to want to believe nothing nefarious is going, doesn't mean there isn't. See, two can play that game.
That the CVR has not been reported to be found should be a concern to all who are interested in a complete and fair investigation. Dismissing that concern is, frankly, repugnant in the light of this tragedy. The CVR is a critical piece to this investigation. There are parties that may not want that information to be revealed. This is not a time for excuses if you desire the truth.