The boss fight never made much sense because the neighbor becomes incredibly faster...so..to give some context to that..i suggest reworking a bit his model during the boss fight to make him more stressed and aggressive cause quentin Is about to reveal his secret to the world and save Aaron.
Something like messy hair and more evident Rings under his eyes to give the idea of him being really angry and stressed so he runs faster..he should also carry his shovel and smash It on quentin's head if he catches him with a new jumpscare, if he finds quentin in a closet he should push the closet on floor and make quentin crawl out of It,same for tables..
Imo these changes can help making the boss fight more interesting!