1.Well, I wanted to say about a more cooperative mode in the game if you can do will be a beauty, it's like this: when your friend runs out of gas or swords
you can search for it or just give one of its him
2.the other thing is about the horse that needs a button for you to call your horse, and the horse is far looks like the anime you can lead the horse to your friend instead of the horse stay if teletranportando. It's a very complicated suggestion you get hold der if more will thank very same and sure many people will like.
3.first person mode
4.throwing blades at titan's to blind them in mid air
5.cannons that shoot wires with hooks for making a trap for the female titan or normal titans
6.that Titan eren can fight the female titan
7.to cut more parts of the titans as arms
8.when the titan dies his skeleton is on the ground for about 10 seconds there disappears like it go evaporating
9.when you cut the neck of the titan getting a hole in his neck
10.is the last that was waiting a long time, very violent (most anime is very violent) that's when you kill some titan you to have blood on your character or at least their swords stay with blood
11.one more thing I'll add now, since I am a very violent person (muahaha) I wanted the corposs people killed when stay on the ground