Clubba, the whole triple double blind thing seems better than a double blind pick in theory. But practically speaking, it seems kind of unnecessary and unrealistic to implement.
When you pick a character in a double blind pick, say falcon, it's understood that your opponent just might end up picking kirby. Double blind picks are a risk, that's why people usually end up going pika/kirby with them.
If the core of your argument is merely, "well let's minimize the possibility of a character getting ***** by a counter pick in the blind pick due to probability/luck/chance/whatever you want to call it," then my response is the same as it always is when dealing with things like this.
Nobody is making you play X character. If you picked falcon in the blind pick and your opponent picked kirby, so be it. You accepted that risk when you picked falcon. You had every right to pick pika/kirby if you wanted to.
Like Cobr has been saying, double blinds are still a 1000 times better than Player A choosing their character and then Player B choosing their character after.
I understand that we're all "thinking within the box," and i acknowledge that there probably is in fact a more "fair" way to select characters, but it's still important that we choose a character selection process that is relatively quick and easy.