Ik I'm 5 years too late but goddamn, never did I ever expect this game to be an absolute w. I tried my best to roam around and complete as many side missions as I could. I'm in the epilogue now, which means my heart has already been broken. Even though it's almost over and even though I've completed almost all side missions, I'm just at 75% completion. The level of content in this game is just awesome. I hope I'll reach 85% or higher by the end of the epilogue.
I might go and try RDR1 after I make the most out of this game. I made a backup save file in chapter 6 because someone told me that there would be a point of no return at the end of chapter 6. After I'm done with the epilogue, I might roam around again using this file and complete hunting missions and whatnot.
For those of you who haven't played it yet, try it. You can thank me later.