Whether the FFDO program has made airlines more secure, there is no objective way to determine. Some may believe it has, other may disagree. Since there is no way to prove either way we'll just let each have their own opinion.
As for the cockpit door, if it isn't secure, make it so. I know that in less than a day I could make a door that no one could get through with anything found on or sneaked onto an airplane.
Again I'll ask, If you are going to argue that a crew needs to be armed to provide for the safety of the flight, then all crews need to be armed. What about the thousands of flights each day that are unarmed? Don't they deserve to be safe as well?
Not trying to bash anyone or their opinion. Some approve of the program and others don't. I'll not have a falling out with some one who disagrees with me. Again each are entitled to their own opinion.
My original point was that if you want the FFDO's to be LEO, train them & let them carry concealed. Not the joke of a program that they have now. When I was in law enforcement I was expected to have my weapon any time I left my residence.
Also, I personally believe that any law abiding citizen should be permitted to carry a weapon.