Are you sure about metadata stuff? It's true we don't have anything official at all, but as long as I can see searching the featuring artist should be along with the main one, and not in the title. The only official thing I could find is on Spotify and it appears like that, not in the title. The beatmap should be named like this: "Little Shadows - Fracus & Darwin ft. Mi'A". In some websites such as amazon or shazam the title also appears named like "(Original Mix)", you can check everything I pointed out here: https://www.shazam.com/es/track/148336868/little-shadows-original-mix
Please let me know if I'm mistaken or in case you know an actual official webpage where we can check all this stuff.
i actually just used the metadata from derandom otaku's set without thinking too much.
ok so according the the official record label page here https://hardcoreunderground.co.uk/store/view/fracus-darwin-filth-and-dumb-hatred-1xcd it's just Fracus & Darwin feat. Mi'A - Little Shadows
about original mix, it's not only not written in the label page, it's also the only version of the song, so i don't think original mix is needed.
nitpicking but 00:22:383 (2,4) - should probably be visually spaced similarly to 00:16:555 (1,2) - and 00:11:069 (2,3) - for consistency
i got a suggestion for u dog, so current bg doesnt really fit in my eyes to the song as this very liquid dnb gives enough depth to it and the lyrics stand out quite a lot for a nice themed background; currently this bg looks kinda alright but its really bland with the white canvas and a girl drawing a heart with a tablet (which could indicate your difficulty naming) but if were being honest there are a lot more detailed backgrounds out there that could fit this category better (at least imo) and ill send one suggestion here
https://sandundertable.s-ul.eu/BBlbM6Sr
https://www.artstation.com/artwork/Ya4WAb
this artwork gives great depth to the song its representing with the girl looking at the side and the beautiful horizon, filled with a very subtle and abstract landscape (even has a heart on the wall which looks cute) so having all of this together just makes the map have more artistic, kinda melancholic or adventurous experience when compared to the current one
however its up to you if you want to change it as its not really a huge deal (only makes it stand out more and fit the song better)