Why didn't Arno hunt down Shay Patrick?

In the game, we come to know that it was the former Assassin, now a Templar by the name Shay Patrick Cormac, whom kills Charles Dorian - Arno's father in the other game Assassin's Creed Rogue. This leaves me to the question: Why didn't Arno Victor Dorian,
the prostagonic in Unity, try to find the real truth about his father and hunt down Shay Patrick Cormac and ultimately kill him, if it wasn't Connor with his american assassins? This could be a new DLC for Unity. For Arno to hunt down Shay Patrick Cormac and
kill him, in revenge of the death of his father, Charles Dorian. Other than that, the game is great, despite having some bugs yet to be ironed out with patches.

:)

 

Assassin's Creed Unity - Suggestion for another DLC

I have a suggestion for another big DLC that should see the light of day in Unity. Remember in the main game, the story revealed it was the former assassin (now Templar) Shay Patrick Cormac, whom killed Arno's real father in Versatille in France. My question
was simple: Why didn't Arno try to find the REAL killer behind his true father's death, and actually tried to hunt down and kill Shay Patrick Cormac? That would make the story extremely logical and a lot more enjoyable. So my suggestion for another big DLC
is simply for Arno to hunt down and kill Shay Patrick Cormac. Some locations could simply include Egypt in one way, since Egypt was mentioned in the end of Dead Kings, and another potensial character to deal with again in a new DLC, while hunting down Shay
Patrick Cormac, would be to meet Napoelon again. I consider such a DLC very important and it would fully "complete" Unity. And more important: Please fix the remaining bugs of the game. They are really annoying!

 

Is AC Unity worth playing?

Unity is fun, but its not as good as Black Flag. Arno is just boring, and the world is full of stuff to do, but you rarely have a reason to actually do it, know what I mean?

Rogue, however, is a great game if you have a 360 also. Rogue is almost exactly like Black Flag. Shay is a fantastic character, and the way he goes from Assassin to Templar is very interesting. I hope we see more of Shay in the future, and Rogue ends when Unity begins.