Since I first played shenmue on nulldc, I use the "adaptative linear (new, buggy still)" graphic plugin that don't display hud, so an hud less or some parts of it invisible. For example, since I can look at some of the ingame clocks or the watch of ryo from the inventory I don't need it on my hud.
I still want to see an ai upscaled textures mod and will look into it after the record of my longplay of shenmue yokosuka.
What I would really like to see is a mod that allow ryo to do some of what npc can do, like sitting, eating in restaurants.
But since it's just the port of a dreamcast game I don't know how it could be possible unfortunately.