It’s a lot of cool artwork, but who knows how much of it would’ve made it to the final draft or in what form. Same with the script that was leaked, there’s no way of knowing what the version made into a movie would’ve looked like.
From what the leaked script said, Hux was trying to learn how to use the Force to try and get a leg up over Kylo Ren. He collected lightsabers to try and achieve this, and he used one to commit suicide when the FO was losing Coruscant.
Much better sounding than him simply becoming a pawn of Allegiant General Pryde. I mean, Hux was a great tactican like his father before him. It would make sense for him to be leading the First Order in some way or form.