True, hopefully those lessons will have been learned and if a reasonable point of loss can be found, it will be far more initially effective in this case
As above, the "key" to finding AF447 was re-evaluating the P of the "pingers" actually working / being heard. Contrary to the opinion of industry, the firm conducting the analysis downgraded this P, which led to the area close to LKP being the "most likely" to be found. It had earlier been eliminated since the much heralded "pinger detectors" had already tried there IIRC?
There was little incompetence
AFAIK. The same firm had already taken part in earlier searches. I think you'll find the mathematical principals are already being applied to MH370 e.g. why the SCS was still searched even when it was "not likely" there.
My only conclusion from AF447 as applied here is it is unlikely the recorders will be found.