At first I was not entirely sold on the series. The art was sublime but I was (and still am to a degree) not entirely latched onto the characters present. However since chapter 18 or so and into chapter 22 (the time I am writing this) it seems Isihida has truly hit his stride. The characters that matter are finding a deeper entrenchment into their identities, the world of what Choujins are seems to be expanding into a more tangible manner, and the art in the most recent chapters have been spectacular.
As of now, I am still unsure if Choujin X will surpass Tokyo Ghoul, but I do think that it has certainly stepped out of the shadow of Ishida's previous work at this point. If it continues in this direction I truly think that Choujin X has the possibility to become Ishida's peak. The way Choujins are more free as a concept rather than Ghouls (i.e. not simply based off RC cells and organs, but rather how the character of who someone is impacts their Choujin form. I see this similar to cursed energy from JJK.)
As for anything else, I can't say much as the story is still in its infancy and I do not see it going anywhere anytime soon (unless Jump decides to axe another great manga like they did to Ayashimon...)
8/10 as of 5/29/22
