Bug criteria: is the band awesome? do they have a brutal logo? not a bug.
Black Dahlia Murder is melodic death metal https://en.wikipedia.org/wiki/The_Black_Dahlia_Murder_%28ban...
and Murderdolls are horror punk https://en.wikipedia.org/wiki/Murderdolls
Same is with Gothenburg and melodeath, but that one is much less known.
I'm actually more of an electronic music fan, but they both suffer from the same disease: hundreds of sub-genres with less than 10 producers/bands that can accurately represent them.
I hate sub-genres of music.
Death metal, melodic death metal, math metal, black metal, doom metal, death suicidal black metal, funeral metal, funeral doom, drone, heavy metal, power metal, viking metal, pagan metal, folk metal, vampire metal, gothic metal, catholic metal, brutal death metal, technical death metal, trash metal, sludge metal, all of them have more than 10 bands, can you imagine? :)
Extremity also breeds community, so you get definitions influenced by the kinds of people who listen to them. Would you want a ton of people expecting gabber turning up to a generic hardcore night? It's a very different feel. Similarly you wouldn't want people who were expecting Depressive Suicidal Black Metal (DSBM) turning up to a second wave black metal gig.
Personally I like sub-genres, I think they're useful for people.
I don't hate sub-genres as much as some people. I think they're useful and it can be fun to debate the merits of why one band fits into one or the other. It's no longer interesting and fun when people get elitist, exclusionary or militant about it though.