Addition to Sabertooth, Wolvie, and DP

So I noticed that Blade has a passive ability which goes along the lines of "Blade's immune system attacks alien substances, shrugging off debuffs 95% faster based on current power levels". Why don't DP, Sabertooth, and Wolvie have that kind of passive ability? It would be a great addition to them considering their healing factors are very powerful.
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Completely agreed, it would make them better, would like that, please consider this