I advocate a different track: look for the exceptional.
There are eleventy billion 1980s style speed metal bands, and each review is going to be like this: "They sound a lot like Exodus, Nuclear Assault and Artillery in a blender. Really fast riffs use chromatic fills around a pentatonic rock riff. Verses meet choruses, and those are sandwiched between other riffs to make the song seem really far out. The solos are technical and erudite but use two modes and two scales total. The drummer is really good technically but doesn't have much mood. They may or may not use death metal vocals. What really stands out is the (ecclectic vocalist/riffcraft/ass-pounding bass/jazz drums, pick any two). If you really like this kind of 1980s music, or just want to live in a simpler time, check out < band name >."
There are also eleventy billion "undiscovered" death metal bands, and each review is pretty much the same: "Taking back the style of (phrasal death metal/percussive death metal/Swedish death metal/gore death/sleaze metal), < bandname > injects their own outlook into this music, using (exotic scales/true crime lyrics/a flute/bomb blast samples) to give this genre new wings. While you can't tell the difference between the songs, and only notice about twenty minutes later when the MP3s have stopped playing, this band could really scratch your < death metal genre name > itch. Check it out, it'll fuck your skull!"
There's lots of people who do anything well, once it has been done. It's a trial and error and rote memorization process. I think it's great these bands exist, but they only appeal to your metal collectors and completists. The DLA has always been written for people who like good music, and want to check out where metal and good music intersect. Write for people who have lives, and who don't have infinite time to dick around with obscure recordings. Find the best, publicize it, and get it to their sweaty little hands in an easy form.
that's writing for the ages. The endless stream of metal bands will be forgotten by history because most of them don't do anything other than add flutes or Arab scales to cookie-cutter vision of someone else's vision. The DLA doesn't need to chase those down. There's a million basement losers with marijuana habits and shitty day jobs who will do that. The DLA should pursue the exceptional.