@Goatfish Death metal is a genre I have kinda been intimidated by, but I wanted to check it out. My first listen was Stare into Death and Be Still by Ulcerate, which came out this year. I liked that a lot, so I did a little research and decided to listen to Symbolic next. No, I haven’t heard Sound of Perseverance.
It's a black sheep among the old school heads due to the progressiveness of it. There was a really good string of recommendations given to @AC Slaughter in the Metal thread last year if you want to saunter over and look for some things to check out:
I'd highly recommend checking out Sound of Perseverance to see the progression of that sound on Symbolic, and then maybe going back to the roots of death metal (that journey is highlighted above). If you ever want recommendations on extreme metal, hit me or @Enaz Fox or @Tyr up. We'd be happy to be your friendly guides.