What are your issues with the aesthetic? I've not found anything disagreeable.
I personally think the aesthetic is perfect. Simply put, it isn't in the underground death metal "mainstream" -- no uniform Dark Descent production, nuanced, thoughtful composition without pretension (which is what made the Finnish style appealing in the first place). Justin/Chris are not the type of metal scenesters (superficially: they have short/no hair, no patches, jackets, excessive tattoos, and no bullshit old guy posturing*) that are now pervasive, and all the shit actually relevant to their art they hit right on the fucking head (watch live videos). Maybe death metal fans are scared of the thoughtfulness, and genuine aggression (which could be perceived as more relevant to a band like Neurosis).
Frozen to Death is currently one of my favorite death metal releases of "all time". Right up there with first-demo Rippikoulu, maybe a few others.
(Recurring theme: every time a punk source comes into contact with metal it completely reinvigorates the genre. Think: Slayer, Master, Norwegian Black Metal.)
*Not that resembling this matters, but big picture it's pretty fucking low priority.