The Unspoken King is controversial for its deathcore sound, a huge departure from the technical death metal style the band had become known for over the previous decade.

"[7] Although The Unspoken King still carries their usual death metal sound, the shift in their style has been defined by the incorporation of metalcore elements such as breakdowns, clean singing vocals and keyboard accompaniments, as well as less of an emphasis on the time signature changes and polyrhythmic elements which thus lead to The Unspoken King to be widely considered a deathcore album.

[8] Despite fan outcry against the band's change in sound, The Unspoken King ultimately received mixed reviews from critics with much of the positive remarks being awarded to Flo Mounier's drum performance.

"[15] Canadian review site Grayowl Point was very critical of the album, accusing the band of abandoning technicality in favor for a more brutal sound.

It’s surprisingly catchy without sacrificing any technicality [...] However, when they conclude the typical Cryptopsy of [the song] 'Born Dead' [sic] with more singing and an anthemic, almost modern-rock chord workout, it seems more tacked-on than natural or flowing.