Whilst primarily categorized as a metalcore release, Profound Morality's sound combines elements from a variety of genres, including extreme metal, hardcore, industrial and noise music.

Its lyrics, inspired by the "rhetoric of wealth and class" during the COVID-19 pandemic, focus on accountability, blame, integrity, questioning power, and identifying your morals.

To promote the EP, Heriot performed at several festivals including 2000trees, ArcTanGent, Bloodstock and Download, and embarked on supporting tours in the United Kingdom with Rolo Tomassi, Pupil Slicer, Zeal & Ardor and Boston Manor, throughout 2022.

[5] Heriot worked on new material in secret at a rehearsal space in Bristol—a designated halfway point between Gough and the other members of the band, due to the 100-mile gap between them—during the COVID-19 pandemic.

[5] The addition of Gough caused a shift in the band's writing and dynamic,[4][7] and Gage would credit the pandemic with providing a "creative release" that allowed them to reinvent their sound.

[1][7] In April 2021,[14] Heriot wrote and recorded the bulk of Profound Morality in five days at their rehearsal space, piecing its tracks together from a folder of riffs and ideas.

[25][26][28] Blabbermouth.net identified the EP's core as "short, spiky bursts of churning, atonal hardcore", as seen in "Carmine (Fills the Hollow)", "Near Vision" and "Enter the Flesh".

[1][26][27] Gough cited Billie Eilish and Caro Tanghe (of Oathbreaker) as influences on her singing;[1] BrooklynVegan also compared her vocals to Chelsea Wolfe and Emma Ruth Rundle.

[9] In an interview with Stereogum, Gough cited the "rhetoric of wealth and class" during the COVID-19 pandemic as an influence on the EP's lyrics, believing that it uncovered a divide in morality in relation to both factors.

[30] According to Gage, the EP's title reflects humanity's present pushing of moral extremes—both good and bad—to achieve fulfillment, "and the fear of where they’ll end up in the future.

[17][29] Boolin Tunes and Distorted Sound highlighted the videos' "murky orange glow" and their "regular use of motion blur and often choppy visuals to complement [Heriot's] fast-paced songs", respectively.

[45] In his review for Kerrang!, Dan Slessor felt that Heriot had mastered the "art [of] being truly crushing", highlighting its riffs and Packer and Gough's "dual vocal assault".

[27] BrooklynVegan reviewer Andrew Sacher stated that Profound Morality "fits in with the current metalcore revival, but [shows] Heriot are already transcending that", comparing its "unique and inventive" qualities favourably with genre contemporaries Code Orange, Knocked Loose, and Vein.fm.

[21] Nicholas Senior of New Noise Magazine called the EP "astounding" and "assured" and felt that it set a new standard for metalcore, which he found particularly impressive given it was the band's debut release.