So I recently bought the RDR2 Original Score Soundtrack, and something that really stood out to me is the art inside of it;
The art for the original soundtrack and the original score are telling an interesting story: the original soundtrack shows us Arthur on the cover itself, and in the inside of the vinyl, are the gang in their prime riding together - all of the iconic imagery we're used to see during the game.
However, the art of the original score is almost exclusively Micah related: the cover is a clear contrast to the original soundtrack (black and white vs. colour, villain vs. hero), but what I personally find most interesting is the art inside of the vinyl:
From what I've seen, the internet seems to be in disagreement over who Micah might be shooting; while it makes sense it is Arthur given the story of the game, seeing him in a pitiful position feels out of character.
To me, this art looks like Arthur's portrayal from Micah's eyes; there are 6 graves, possibly to represent past gang members who died during the game? (aka Sean, Kieran Lenny, Hosea, Molly, and Grimshaw).
Micah was not responsible for all of them, but it was his mission to try and get cut as many gang members as he could "loose."
There's also 7th grave being dug (represented by the shovel), presumably prepared for Arthur, given their relationship and his ending.
After Guarma Micah sees Arthur as weak, he stops being scared of him and replaces him as Dutch's right-hand man, which is the reason why Arthur seems so weak in this art compared to Micah, he is reduced to a pitiful sick man who has to beg for mercy, nothing more than another link to cut loose so Micah can advance.