The Faceless Men’s whole gimmick was to get up close to their victims wearing imposter faces, which she didn’t do
At no point in her training did she learn elite level parkour moves, throwing daggers like she did in front of Gendry, or sneaking
it gets worse, the more you think about it
The writers aint even decide to write her to kill the Night King until they were filming season 7 in 2016... so that "you will close blue eyes" shyt was a retcon
Waif had Arya bleeding all over Braavos. She drops out and suddenly she's going toe to toe with Brienne.
She didn't even know how the White Walkers fought until the last episode...
from a tweet I saw
S1: Occasional
Water Dance Training from Syrio
S2: Giving Tywin
water
r S3-4: Being protected by the hound & getting like 2 kills on easy targets.
S5: Washing Dead bodies
S6: Waif
S7-8: God, can go toe to toe with Brienne
S8 episode 1: hears about White Walkers
S8 episode 1: Gendry tells her White Walkers are "bad"
S8 episode 3 50 minutes in; completely shook of the Wrights
S8 episode 3 ending ; kills Night King