I just changed my plugs myself this past weekend and now I have the same issue with my 2011 with a few exceptions. Before changing them there was no miss at all, the old plugs looked like they were burning good just the electrodes were getting rounded off on the back side. I just bought the truck so have no idea how many miles were on them. I took out standard NGK and replaced them with NGK platinum all gapped at .044 Now there is a definite intermittent miss between 1500-2000 rpm. Starts fine, idles fine and it's not missing bad enough to throw any codes at all. Other things I did while I was in there was R&R the throttle body and cleaned it with CRC brake cleaner because it was pretty gunky (official mechanical term lol). Also installed a program for 87 octane with my superchips f5 programmer but upon restoring the stock program the miss is still there. Also I sprayed a little brake cleaner into the intake to loosen some of the oil film up that was there (should note there are almost 114,000 miles on engine). Only 2 things that are jumping out at me and that is #1 possible the base o-ring on the throttle body didn't seal correctly when I put it back on or #2 (and I think this is more likely) I cracked a spark plug when I installed them, specifically on the 5 or 7 cylinders. If you've ever done your own you'll know why I say that. The miss is so light that it doesn't throw a code but you can feel a little vehicle shake and pick up the slight intermittent "pop" in the exhaust tone. I did the muffler delete so you can definitely hear it. I know you're situation is a little different than mine but similar as well and I didn't mean to bogart your post with my own problems but I wanted to share my experience with you. If I find the cause of mine I will let you know. Going to start on cylinder 5 and 7 removing the new plugs and checking for cracks AFTER my ribs heal up from leaning over the fender the first time, they're a little tender now lol.
