I'm seeing a lot of reviews from early in the game which say it's unfinished and unpolished -- I played it after all of the DLC had been released, so I can't talk about what it was like at release, but this game took over my life for a while in a really good way. I like Stardew Valley fine as a whole, but I took to Graveyard Keeper a lot better, possibly because I was goth in high school. I'm less into farming, which is very much there in GK but a little bit less of a focus; GK is more about navigating crafting trees. It's very similar to Factorio in that regard, but it's a lot less...Factorio about it than Factorio is, if you know what I mean. I did love itvery much, but there is a line -- and it's different for everybody -- that most people hit with it where you're perhaps too stupid for it and you never pick it up again and it sits in your library quietly judging you and you just go on with your life, a little weight off of your mind. GK is plenty intricate and you'll need to make some diagrams, but it's more about organization and management than comprehension.
GK is also lovely -- look at those screenshots! That's some beautiful art! -- and I found it a lovely world to hang out in. There's a ton of fun characters to befriend, everybody has these quest lines that are really satisfyingly journaled and laid out -- as a Capricorn, I do love a game that makes you create a routine for yourself and a bunch of to-do lists and lets you complete them at your own pace. There's a pile of stuff, and you can tackle it however you like.
The wall I *did* hit was because that pile is a little TOO large with all of the DLC installed at once -- each has a new mechanic and storyline, and there's just so much of it. Breaking Dead contains zombies which act as automation and are a fairly essential QOL feature, but I'd advise holding off on the others until further in the base game -- if I'd paced it better, I would have been less overwhelmed.
In short, I highly recommend it!