I should say that I have been to apple with this through their customer support. It has been over a month with zero progress although there have been things on my end not contributing in terms of help (illness, holiday, work).
I have been given a case number and assigned an individual that is one step up from their general customer care employees. My issue has also been forwarded to the software engineers as this issue has been through all other means of troubleshooting and is at its "last resort" phase of fixing. According to the apple care senior advisor I have been speaking to, this was the first time this issue has been reported. Their internal forums for known issues, this was non-existent at the time.
In troubleshooting, I have factory reset my phone and set up as new without restoring my back up. I have found that downloading an apple TV movie I have and then watching without wifi or cellular data (video plays directly from phone) that it still has framerate issues. This has also been seen in many games that are offline as well and I have even begun to notice this in some of the interface. Sometimes when swiping to different screens my phone stutters, using the internet, Facebook, and some other apps. However, this last bit of news I just reported to my apple care senior advisor via voicemail within the last few minutes.
I will update when I have more. What I would suggest is that not only is this forum forwarded, but everyone contact apple with their issues as well. Since there has been no mention of this in any of their forums (as of last month) I am under the impression that I am the only one who has reported this issue to apple since they were not aware of this at all.