If you read the rest of my post that you quoted you will find that is just what I suggested. ADS-C contracts of reports once every minute were suggested by BEA after AF447. if there is ever agreement on the use of ADS-C EPP there will be even more information available and as a standard 'out-of-the-box' system. Add an ACARS over SATCOM that reports exceptions which AF447 did have or health monitoring systems over SATCOM, all existing capabilities and a reasonably coherent picture of what is happening on the aircraft is continually available.
All of this could be done now - and by the generosity of INMARSAT it could be 'free' if considered tracking information.