How's the loop?
The campaign moves you (every X missions) from one "camp" to another, basically around the map, for story reasons.
When you're in a camp you're still free to explore the whole map (more or less) but you tend to stick around and do the activities around your area.
I'd say compared to other R* titles, activities are a bit more integrated into the world, similar to how random encounters in GTAV worked, but more organically implemented.
The pace is slow though, and that's just something you either accept or drop the game over.
I love the slow pace, i love to soak in environments in open world games, walk around etc, so that was gravy for me.
For example when you enter a house to loot it of resources, Arthur literally hand picks cans of beans and tobacco boxes with an animation, if this drives you crazy i can understand ending up hating the game.
My only real issue (aside from the main missions still feeling too tightly scripted) is that the aim/shooting still doesn't feel good, at least with a controller, despite being an improvement from GTAV, and despite the setting being a bit more forgiving (guns were shit back then after all).
I would've actually liked for them to slow down the game even further, just be done with the enemy waves entirely, and increase the survival elements, but i understand they still wanted this to be a mass appeal game.
Also Arthur is the best character they've ever written in my opinion.