FFObsessed said:But seeing as they increased the M4's auto-aim with the last patch I doubt we'll see that, but it's also not that big a deal.
Nothing actually changed with the M4 in the last patch... same deal with turrets, a few people seem to think they got stronger but there were no changes (excluding the possibility of some bug that's crept in and no-one has noticed it yet...

Every change that's made is listed in the list of fixes that gets put out with each patch. There aren't any "stealth changes" - there's usually a section of "various minor tweaks and fixes", but they are exactly that, minor - anything which affects game balance would definitely be detailed in the patch list.