Disclaimer: I just came across this in my note the other day and decided to share. There might be potential, but don't take it... like... dead-seriously. I mean, at least it would be easy to be implemented as a HRG option.
It's usually better to dispatch a zed and not worry about it anymore rather than pushing it away.
Yea I figured this out a couple years ago, which is the fact that coincides with the cause of my major burnt-out over KF2.
Say we have this, this, and that option/method/weapon/map in the game, but what matters the most is kill the Zeds ASAP, particularly due to the game's playground is set in a context where little to nothing other than killing the Zeds like make-them-drop-dead-on-the-floor could be relevant or at least meaningful.
For instance the Medi-gun thingy, why it's bad and rarely used; because as things stand it's decisively so that it's more effective to get rid of the source of incoming damage by removing 'em as efficiently and quickly, in other words it's too slow/clunky/inadequate to try to pull out the Medi-gun in response of a squad member sustaining heavy damage. From my memories trying to corporate it to the gameplay, I found it is so clunky that I need to be pulling it out in advance of a incoming attack that *might* cause heavy damage to my team -- or else it's highly likely that we'll take casualty, and given costly investment (which in this case is our lengthy/inconvenient equip time) doesn't go well with unpredictable outcome, the results I got from this defensive action aren't even remotely comparable versus an offensive approach.
This pretty much goes with every aspect of the game's gameplay projection. The game isn't very successful at making enough options viable/fun/rewarding, in ways that offense is outright better defense (principle of play), killing Zeds is outright better than incapacitating them (feasible approach), insta-kill them with a bullet to the head is outright better than burning them down (tools of choice), nice flat hallway is outright better than interesting curves (map design & location of play), etc.
I wish KF3 is soon.