The Infantry Problem 2

[TerrorBite]

(...)
What I think is a better solution to the infantry "problem" is to mitigate damage received from bots on harder difficulties.

This sounds clean, probably easy if you suggested it, and potentially a good balance in my eyes. 
But i do wonder: 

Would it be 'infantry tree only' specific, keeping in mind hybrids
Would it work with crush through
Would it apply to shield

Essentially how would it differ from the jug bonus besides the game mode specificity?