Well, that's pretty cool ! I personally don't see the point of displaing how long is a game, but alright. Also I tried to show the completion status, but as you mentioned, it is not formatted, and it also seems that the text stays in english no matter what. No way I'm leaving it like that.
As for the change from steam banners to fullscreen background, I found out that not everyone is using steam heroes, and in my Steamnite theme, as of v2.2, 16:9 display properly, and they can be used in both desktop and fullscreen themes. So I decided to use them. Ah, and not everyone use Steamnite, or only use the fullscreen part of Playnite.
As for the change from steam banners to fullscreen background, I found out that not everyone is using steam heroes, and in my Steamnite theme, as of v2.2, 16:9 display properly, and they can be used in both desktop and fullscreen themes. So I decided to use them. Ah, and not everyone use Steamnite, or only use the fullscreen part of Playnite.