Was there a patch? All I know is that being a Diamond LMG user I only use Quick Draw, never. Even on my RNG LMG class (MK48 - Silenced, and TF equipped) and I do just fine. I've tried QD a few times even with Dexterity and didn't notice enough difference to use it.
Does it even matter. 95% of all lmg users sit in a corner or window and ads with their target finder.
im currently diamonding the lmgs (and yes using the target finder) i could notice a big difference soon as i got into the game
huge thumbs up from me for the buff to ads times