I haven't done actual testing of it, but depending on what damage you're doing, it might sometimes require an extra hit to kill without using the rad remover mod. I think it has more of an impact on horde night when you might not be always killing everything immediately. Being able to shoot a radiated zombie once or twice to prevent healing and letting your defenses deal with it can be helpful. But it really comes down to whether or not a different mod is more useful for you. Every installed mod increases your damage, so you always want to full mod your weapons (and most tools), so if you have an extra spot where no other mod would be better, using the rad remover is worth it. Personally, I'd choose that over the hunter mod since you aren't killing animals as often as you're killing the radiated zombies later in the game. And regular food animals like deer and chickens that you might be killing somewhat often are one shot kills even with a weak weapon anyhow, so hardly require the hunting mod. The other animals where the hunting mod would be of use aren't usually killed anywhere near as often as radiated zombies later in the game.
It will be interesting to see if the rad remover has any impact on the two new zombie tiers. If they also heal and it prevents them from healing, it would have even more impact. If not, then it will probably be less useful as you'll have more zombies that don't heal that it doesn't do anything to.
