This game's testing has always been internal, whereas Warframe has done public testing. FFXIV's team rarely releases internal formulas and data like that, so I wouldn't hold your breath; if the line of thinking is "I'm going to assume it's completely wrong and has been wrong this whole time because of my personal experiences" there's little point in continuing the conversation. FFXIV has been out since 2.0 for a while now; thinking that they haven't tested their RNG is...there's a word for it, but I don't want to be mean, because I know it feels really bad to fail stuff like that over and over. But you sincerely need to have a little trust in the game.