Further more I was surprised (and disappointed) that RDR made little to no effort on improving on story based decisions. I thought that was going to be a sure thing given its subject matter yet from what I remember the only choice you make is to save that girl or not at Thieves' Landing for the strange man. Maybe there are others, but nothing that remotely significant in any way to remember..
Even not having another ending was disappointing. It would've been way more interesting if the honour/fame system had more consequences for how the rest of the story played out. Maybe John could've survived due to the chances that some of the acts he committed paved the way for a better conclusion.
I know some of the choices didn't have many major consequences in GTA IV (Besides Deal or Revenge), but it was an interesting concept how sparing some characters let them show up as random characters later on. RDR didn't even reach that far.
I guess a lot of the foundation was laid with GTA IV and yeah RDR isn't from the same series, but IMHO it takes a lot of missteps than it's given credit for. It's still a great game and deserves the praise it gets for the most part, but it's far from being the flawless masterpiece it's known to be.