vCoH deflection shots dealt 50% damage, even if we imagine that every single T70 shot would have been deflection, with its 40 maingun damage deflection would have delt 15 damage.
How big this horde must be to take out litteraly anything, even to make a difference and deal 160 damage you need 11 shots.
0.5 x 40 = 20 not 15.
How much time do you think that 4 T-70 need to fire 8 rounds?
Point here is that deflection damage promotes spamming vehicles while making Super heavies unable to cope. Already 3 SU-76 can take out an Elephant without any deflection damage, try to imagine what would happen if deflection damage was added.
Both the accuracy mechanisms and armor mechanism are good mechanisms that add dept to combat. People who do not like them should probably stick to AOE or other titles that do not have RNG elements.