Can anyone advise why 100 open slots is required for merchantry?Previously only 35 to 40 was needed before the update.

I'm having the same problem, which also begs the question how are we supposed to trade with the special merchant if the inventory needs to be completely empty.

 

Another issue I have since this update is that all my final ratings are now D and no rewards - where before yesterday I consistently got S rating - I did the exact same thing on both days because I'm new to merchantry.

Saw that awell yes... First time I ever saw a C and D... Makes me not want to do merchantry anymore.... Basically the game is now only good for grinding and hording... Lol