Change the fuel rail pressure sensor my 08 5.4 block did something similar after throwing a code for fuel pressure during a wot car ran like garbage got home barely ran.... also sounds like you have a big cam in that motor?
Will do. Stock cams lol, just running rough.
I would go this route. Might as well go back to the control group and see if the maf and tune change take her back to normal. That could rule out a mechanical issue.
She gone