If you're going to tap frets make sure to have some super thin superglue and accelerator on hand to wick into the fret slots. I can't count the amount of times I've seen tapped in frets pop right back out.
As for fall off, I think it's more successful on lower radius fretboards like Fender 7.25" and 9.5" radius boards, where you have to deal with the string choking on higher fret bends, but I've never needed to do it on a 12" radius or higher fretboard, and with a proper levelling I've got ridiculously low actions. Most people that play my guitars don't like how low I get those strings
IMNSHO levelling beams are superior to radius blocks in getting a good fret level, while taking the least amount of metal.