Ruuz
The things that this 2019 Pet Sematary add to the original may not strictly speaking be improvements, but at least it's not a shot for shot remake, which it was looking like it might have been based on the trailers. A couple of those additions I was not particularly fondof, one's a massive spoiler so I'll let that slide, but the biggest one I knew going into it, 'cause of the trailers, which is: As much as I appreciate John Lithgow, I really wish they had kept this guy (or an emulation of him, I more mean) on as Jud Crandall.
Unrelated sidenote, but when I was young (and I found out about Pet Sematary overall through the Ramones song of the same name) my dad always told me that it was called Pet Sematary and not Pet Cemetary beca...