FlightPlanOBN;
Re, "make FOQA data public....keep track in a database... "
Back in the 90's the distributed archive project in the U.S. was intended to do such a thing. Not sure what happened to it. It was de-identified as to airline etc and focussed on aircraft type, for obvious reasons.
That said, such data shouldn't be "public" in the sense that anyone can take a look at it.
Back OT, one of our FDM Program events provides data on over-run potential. As such it is a useful tool in the overrun prevention kit.
The event determines the runway remaining from the touchdown point using ground speed and a standard, nominal deceleration rate. If the runway remaining is a negative number an event is created. There's more to it than this of course but that's the FDM principle.
PJ2