Loooooved it, despite some obvious flaws... (NO SPOILERS)

I could almost tell this film was written / directed by a woman (don't ask how, idk), woman who happens to be born on the same day as me! (but different year)
The story is slow-paced (so slow-paced that there's several slow-motion scenes in the first half of the movie), which may seem boring to some (not me), but pretty suspenseful throughout if you're really into it. The portrayal of PTSD and other mental health issues is truthfully depicted, Vincent's sexual frustration and attraction to Jessie is very subtly dealt with so as not to disrupt the main plot, and the bodyguard job is presented quite realistically.
However, there were a few things that bothered me a little bit:
(1) the limited outfits - I know Vincent was on duty the whole 48 hours but couldn't he change from that synthetic blue gym jacket? He was wearing it when he arrived at the house, and in the final scenes, so it seemed he wore it for 2 days in a row, although occasionally taking it off.
(2) some music seemed out of place in some scenes, with too much bass and beats. I wore earpods when I watched the film so the sound hurt my ears a little bit. But I guess it had a point - Vincent's PTSD symptoms
(3) I know I'm being unrealistic now given the limited time spent together under such horrible circumstances, but I kinda wished to see more interaction between Vincent and Jessie - some sexual tension like in other movies. I mean, c'mon, she was married to an old, rich, corrupted criminal who left her, and there comes this younger, buffer, attractive & protective bodyguard who shows particular interest in her beyond his job duties. It wouldn't have been that hard, would it? 
Anyways, I really enjoyed the film and the ending left to the interpretation of the watcher.
What did you think?