Again, there are more viable alternative items now, so if one didn't drop, you may have drop from other boss. Yes, it does mean that it will give itmes for the same slots more often. How is that different from increased drop of one item, and why is it worse?
Now in T14 bossed drop 10 items, if there is a token on loot table, and 14 if not (Except Tsulong and Lei Shi). In T15 "Token" bossed drop 14-16 items, Non-token - 19-21. So whole "double chance" math is wrong.