A lot of this stuff is hollow, uninspired, often ruined by modern production and simply rehashes concepts which have been employed far better by past bands, but I guess it applies just as well to the rest of the subgenres
Brutal death and melodeath bands are probably the most formulaic of the bunch which is why I think, they are so reviled(in the most extreme cases, the former are concerned with breaching the limits of heaviness and speed, whereas the latter come off sounding too poppy and tame to be taken seriously).
Somewhat unrelated, but meh:
There were times when I would get genuinely excited about discovering new albums and bands. Nowadays this enthusiasm seems to be on the decline
I've been ridiculously spoilt by the classics of the genre(Guardian of Dorkness,Malignance: you and yor fucking lists
) and whenever coming upon a new album I can't help but initiate a comparison to a classic release it reminds me of. It would still be enjoyable but probably won't leave a lasting impression and will end up sooner or later in the pile of stuff I rarely listen to. Just look at your list, LS,it's mostly a compilation of classics, how many of these bands you're talking about(please name some of them, at least
) have the potential to make the cut for a long-term favorite entry?