This is not intented, if that would a case, then they surely would mention about it at patch notes, and since other mods are broken, such as overcharged on lasers, any of them(pulse/burst/beam), does not have dmg boost, yet still draw more distro and heat. While overcharged multicannons are just fine as they where before.
I have quite lots of laser weapons, wich all are either overcharged or efficent. Those are useless now.
Or long range PAC, if that have plasma slug, instead of having -10% dmg plenalty from effect, it have now -60.6%. While railguns, along LR and plasma slug, its penalty its just -3.3%, while it should be -10%. Same mods and same effects, yet quite diffrent results, and since its like that, it can be only explain as messy bug.
While try puting Oversized on PA.... Good luck with one-shoting all things even thagoid Hydra, despite its 99% dmg resistance, and that alone should be enough why hotfix is rather needed sooner than later. But again, good luck with getting that one bugged out, as I not able to get my PA into weapon of doom.
So yeah, its so messed up, that my only bulid that is not "nerfed" by that mess, its my railgun phantom, wich does now extra 6% dmg per railgun, lol.
Edit:
So I went to my old fella bill, to see whats going on... I wanted to see if I can make a c2 PA into one-shot killer, but it did not work for me. I guess only handfull players were able to have it. For me, oversized granted me a whoopin 0.3% dmg boost, and it should be 3%. Plasma slug effect on PA, is -60.6% reduce from -10%. Phasing seq should have -10% penalty, it does only have -2.2%.
For any mod that increase dmg, overcharged/short blaster/efficent it still does it, but only partial. G5 OC/SR nearly 15% increase dmg, G5 efficent only +4%.
Looks like almost anything what messing with dmg values is broken. And seems like diffrent weapons trees was affected diffrently.
So yeah, laser and plasma weapons was affected most by that.