and with higher damage that small arms do and armor debuff that m3 got, m3 in distance will take good damage, just as m3 does good damage due to inf armor changes. so it goes both ways.
well it does go both ways, but to be more specific, the changes didnt have equal effects.
the majority of the grens increased damage comes from increased accuracy. since grens already had 100% accuracy against scout cars, their dps actually didnt go up dramatically against the m3. with 100% accuracy, the old dps was 2.9 at long range. the new dps would now be 3.5. thats a 21% increase. if youre shooting its front armor, the chance to pen has only gone up about 7%. those changes combined are still a lot less than the effect of grens going from 1.5 down to 1 armor, so the m3 gained much more than grens did.