I've had that problem with a few of the other smg's from time to time, but with this games connections it kind of throws a curve ball into the mix when trying to weed out the reason behind the inconsistency. Just curious what was your average connection when you experienced the inconsistency with the PK?
PK not that good at CQC? Is that from personal experience? It seems to work well enough up close, granted it's not mind blowing or anything but it gets the job done for the most part. Now don't get me wrong the AN-94 is a great gun, but the drawback to using a AR is the lost in speed/mobility. Depending on your play style this is a big factor.
Many players will believe the Peacekeeper is great because they already have experience in the game, and will attribute their higher stats to the weapon instead of the fact that they have just gotten better at playing with any weapon.
The PK like every gun will be the best thing since sliced bread for some, ~meh~ for others and a waste of space for the rest. It's all about where a players strengths and weaknesses lie and which gun fills in the gaps their game better. Personally I love the PK and snatch it up every chance I get and it nudges the MP7 from the top of my SMG list.