Actually, the current situation is similar to the Code Geass R2's one.
Arima "kills" Kaneki and then "delete" his memories is the same thing that happened to Lelouch in the end of Season 1 and now Kaneki is trying to hide the fact that he regained everything, this reminds me of Lelouch again...
Kaneki had a second "Awakening" during Tsukiyama Family Raid, he remembered his mother for what she really was, he faced yet another trauma.
That said, I think he changed drastically but still not at the point to let Hinami or Touka, the two most important persons to him (together with Hide)...