Men you no need that trash program just flash it with new flasher the stock ROM is in xperifirmActually for me, is needed for change Pro mode, standard mode, super vivid mode . When i install Pie with xperifix those options not working only standard, with the fix works all but i don´t know why. I think x-reality not working with or without drm fix there's no difference between on or off.
---------- Post added at 13:21 ---------- Previous post was at 13:20 ----------
For camera is not necessary, because used Camera2Api full but, in my opinion, pictures and videos are better with drm fix (oreo).