Jasons FL patch also expands maneuverability options, which directly affects gameplay. Options like vertical strafing, and rolling while in 3rd person view, are not native to the Disco mod (and allow a barrelroll in 3rd person view). These may be considered cheating.
I also do not see what a maneuverability patch has to do with moving the HUD. Are you using functions from that DLL in the source? At first glance I could not find any reference from the HUDshift DLL to the FL patch DLL, at all.
Yes, the dll is loaded with the "nofovx" function. This somehow places things on the hud where they should be. There might be a way to take care of this in Cameras.ini however. Will work on that.