There are several feats and blessings in Darktide that provide a bonus to the suppression values of weapons, but its difficult to take advantage of the suppression effect 'cause it isn’t always clear when, and for how long it is active.
A feat that lets players visualize when enemies are suppressed would be a significant QOL improvement, and would fit well into Ogryn or Veteran’s designs. It would also be an indirect buff to weapons with suppression effects.
Such a feat would probably need to be bundled with a numeric bonus as well. Vet and Ogryn both have suppression feats that could accomodate such an addition.
Alternatively, a feat that visualizes suppression would make a perfect aura for support veteran, since most players agree that vet’s other two auras really can’t compete with scavenger.