Well, the only game I have that doesn't support progresive scan natively is Capcom vs SNK 2, not a big loss, it still looks nice interlaced.the vwii video chip appears to not 100% work like a real wii one and tends to mess up certain things so setting it into different patched modes can mess it up. one guarantee'd way for example is to boot up the pal gc bios, it will always completely mess it up and display a garbled mess, thats why its hardcoded to be never loaded on wiiu.
Have four games that support widescreen natively, so I left all the others forced to 4:3 from injection (just in case) I like to play in the original AR that they were designed.