Quote Originally Posted by Zofis View Post
Per the patch notes, 9S and other items like the Stuffed Android Units "will now appear in a treasure chest allotted to each party of an alliance when undertaking the Tower at Paradigm's Breach" meaning the intent was to have all of the drops be 100% for each party akin to what was done with the previous two alliance raids and their rare drops in 5.5.
9S was not a 100% drop at first.
Now, it's still not guanranteed, but instead of fightning your roll with 23 others people, it'll only be with your own alliance.
That's what it actually means.