I don't know, I know that one would. And that the people who made the game, were smart enough to consider a not insignificant number of people might decide to randomly bow to corpses if they added a bowing option, so maybe we should plan for that level of empathy and humanity in our playerbase. So I don't think it's that different of a slice of the playerbase that would also want to chop down people who are left hanging in trees. I know I try it in every game where they do it, and I have some method of getting them down, at least as far as classic movie/stories. Like shooting the rope with an arrow or whatever.
I mean they're ALREADY baking in the sun, but they are also bumping into my horse as I travel on the path, and are, theoretically, the loved ones of the various civilians that are sometimes placed WITHIN VISUAL RANGE OF THE BODIES. So you know, probably not the greatest of things, to see your sister or brother, hanging from a tree while animals peck at her eyes, every morning when you go down to the river to get water for cooking.....
What does any of the various aesthetic elements any game has, add to the core gameplay? GoT in particular is built around atmosphere, aesthetic. Loving the land, and it's beauty. So much so, there are MULTIPLE mechanics about just taking it all in, and writing poetry, or playing a flute to become one with the animals. So if the game feels it's worth a gamers time to sit down and compose poetry to get one of a billion headbands (I personally don't but whatever), I don't see why "showing respect for the dead, and burying them" is fundamentally more frivolous than that. Fuck there are 100's of banners, scrolls, and other flavor text things that do nothing but give you codex entires, or a single dude you can go spend a LOT of time sitting there, listening to him, tell stories of the various clans you find the banners for. So, I fail to see how this would be any more of a "waste of the player's time" than that.
Jin's entire ethos is that "Honor is Defending and Fighting for Those Who Can't Defend Themselves" that's literally his definition of Honor, when asked by his uncle. It's his driving motivation to do ANYTHING in the game, base and DLC. It comes up as his admonishment to others being selfish in a time of conflict on multiple occasions. It's all about establishing a tie between Jin and the people and places around him, and how he has set himself as their protector and champion. Hell, there is a cutscene where helps someone bury one of the many bodies that the Mongols left all over to rot in the fields. So even HE thinks it's something he should be doing. At multiple points, when there is someone dead, they take time to have a burial, or mention it. Sometimes an actual cinematic where Jin speaks to one of the surviving people for the dead, others where it's just mentioned offhand.
I mean you don't have to do mechanics for every component. Just have a contextual button for when I get close enough, and then do a fade to black, and load in the "burial mound" assets instead of the "hanging corpses" one.
As to it having an achievement or not, I don't really care about that. There is no achievement for bowing to the dead, but I still do it on a regular basis when I feel it's appropriate, or I'm just feeling over empathetic that play session. I would personally just enjoy cleaning up that aspect of the warzone. And given how many games are built entirely around cleaning up things, making messy/fucked up things, clean/working again, to give someone the option to actually bury the various bodies, I think there is a significant number of players who would enjoy that, achievement or no.