Again, you can just leave the RT5X in 1440/16:9 which would be generic sampling for all resolutions with the correct AR without doing any extra work. Or you could use one of the 1080p/1200p modes. These would all be the "better" solutions you're looking for.
In general, if you don’t want to do any work at all, the 1080pFill mode is exactly what you want. The other resolutions were always for the tinkerers. Unless you want to put in the work of adjusting the sampling settings, matching to your monitors native resolution is moot.
I wouldn't recommend running any game in 480i, if 480p is an option. Even with MA deinterlacing the image quality loss is too severe.
I mean, I wouldn't be complaining about those.
I appreciate that, but someone else would.
Keep in mind, I'm but one guy trying to juggle many requests