Obviously the "0x000000F5" profile is far too simple to work for trouble-free implicit DX12 Multi GPU. It is basically just the equivalent of DX11 AFR rendering without any special compatibility bits enabled. NVIDIA would have to invent special SLI bits and undefined SLI values for DX12 for it to be useful. However it still might happen as DX12 evolves, just like it was the case with DX11 over the years. But I do agree, that explicit DX12 Multi GPU done by developers is definitively the better and cleaner option compared to potentially "hacky" driver solutions.