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 because Americans spelt it that way. That guy lied about... Just everything.
Final rating:★★½ - Had a lot that appealed to me, didn’t quite work as a whole.