If she ever gets her reunion with beloved big bro/secret cousin Jon, we may see more of the old Arya shining through, but there’s no guaranteeing that either of them will live long enough to cross paths again.
Arya looks like much less of a lovable scamp on Game of Thrones lately.
She does still smile, but usually after she has pulled off some kind of epic knife move or enacted her revenge on somebody.
After all, Arya is based out of Winterfell as an army of wights and White Walkers are crossing into the North, and Jon is part of Dany’s large host of fighters.