I think a remastered version would be great to see using the latest incarnation of the Dunia engine. I would be more than happy to go back and play with 4K graphics and all the little added features (kicking, shooting from vehicles, the grappling hook, etc)
Add coop and the single player map editor like Far Cry 4 had and you would have an instant win with most folks.
Sadly I think most games just go the path of least resistance and it would be pretty much the same but with the improved lighting and SOME graphics upscaled (like terrain and vegetation). I don't think they would actually work in additional features.
On the other hand they would be foolish not to consider something like a prequel. Far Cry 3 did very, very well for them and bringing Michael Mando back to reprise Vaas would be a big draw for the game.
Having said that I sure would love a remastered Far Cry 2 as well
And all this science, I don't understand... It's just my job, five days a week