Fliegerfaust is still a valid weapon, too bad noobs just used when it was op. I'm using it all the time, it's not easy to achieve kills on good pilots if you're alone, but 2 semi-coordinated ff users can kill any plane.
Can confirm. It is still as effective, you just need to know how to use it. My squad will load in all assaults when round starts with fliegers to take out the lazy 'rush the spawn' planes. Works just about every time we do it too.