I'm about 30 hours into the game now -- still in Chapter 2, with most of that play time being hunting, side-missions, and just riding.
There is one control feature that is still annoying me on a regular basis. I like to ride my horse with my varmint rifle out, so I can pop off a quick shot at birds and small game that dart out in front of me. So when I see something, I hit L2 to aim, which usually locks on to whatever I'm looking at. Except that half the time, L2 does absolutely nothing except prompt me to hit R2 to aim instead, because Arthur put away the varmint rifle without me noticing it, so for some reason L2 is now disabled.
Why? WHY??? Every other game on the market uses L2 to aim your weapon. This game uses L2 to aim your weapon in most other contexts. But for some reason, some of the time, when you're on your horse that action gets switched to R2. If you deliberately set out design a control scheme for the express purpose of breaking immersion to remind the player that they are playing a game and forcing them to think about the controls, this is the kind of thing you would come up with. I'm baffled at how a game like this can have so much incredible attention to detail while letting some of these button-mapping decisions make it into the production.