My lord... yes, Samsung has 10,000 engineers, but all they had to do was come here, all these experts, (and the fools that believe them) will solve your problems for free. Experts everywhere.
A few points... 1) your phone is dangerous, no matter what. Charging or not, rapid charging or not, the battery is a bomb that may or may not go off. It can be caused a thousand different things, and watching a tear down video on YouTube isn't going to give you the answer. Do you really thing Samsung, a typical greedy company, is going to throw away $2-10 BILLION in sales over anything they could have fixed? 2) If they cripple the device then it will have to be done at the system level. Anyone who thinks they are gaming the system by turning off auto updates from the play store is just plain not smart enough to own a smart phone. It would have to be a system level update pushed by the carriers!!! the only way to stop that (maybe) is to disable the updates package using package disabler. The oculas software is a completely different thing, and has nothing to do with crippling the phone. (oculus doesn't run as a system app, its a normal app... it also won't run if it isn't the latest version, so they got you either way!)
Return your phone... want the top specs get a S7edge, want a big screen and an s-pen, get a Note 5 (best buy has a gift card promo that pretty darn good!). Went back to the Note 5 myself, and really like it. I didn't dislike the edge screen on the N7, but I am actually pleasantly pleased by it being gone on the Note 5.