This is cool, maps which give feeling equal to that of the song.

From the examples you gave, they're rare. Actually, the ones you gave can be analyzed by non-players.

I dunno if you will count this, but there's this map which uses overly irregular spacing and emphasis, irregularly slow SV, majority slightly-curved sliders, and dark combo colors. I think this gives off both the dead but emotional feeling, which follows the song lore and general song feeling. There's also the only orange combo color at the end which signifies the sunset the girl sees when you check the MV for the song.

This kind of example I gave, the actually easy example, involves playing the actual map, and knowing context & lore to some extent. This, I think, is an easy way to convey emotion, but the audience is limited. Things like player movement, or contrast to "generic" maps, for example, will only work for players. I guess something like "reversing" through flow reversal would work visually. Conveying regret towards plagiarism through controlled copying, for example, will only work if the player has played famous maps beforehand AND if the player is aware of the context of plagiarism. There are more themes like not caring for others' opinions on quality, literally copying things, and simplicity, which doesn't get to the player if they don't know the song lore (especially if the song's lyrics are . If a similar style and similar pattern is used for songs with story connection, then the audience would be players who have similar musical tastes and has spent long enough time in osu!. There is emotion there, but for a limited audience only. Sotarks' fhana maps with the diff name "Melancholy" wouldn't pop out to people who don't know about it for the first time, but it's the easiest way to show mapper connection. Still, I think it gives off some emotion.

The examples you gave (though only 2 of which I have seen I can defend), are really unique in terms of this symbolism. The right song, right context, and the right mapper, for a really wide audience but still equally effective. I doubt the average mapper would go looking for a song about spikes or sharpness and use all sharp angles for the whole map. Again, it has to fall right.