Why can't people just enjoy the ride? Enjoy the subtle progression of storyline that doesn't try to rush you to the next big action scene? Heck, I find just exploring and doing missions in the frontier a lot of fun. There's so much to see and do in this game. And since I'm an Assassin's Creed fan, a fan of these games' narrative and gameplay, I think the pacing is perfect. I'm in no hurry for this game to be over.
I suppose I shouldn't be criticizing what other people like. It just feels like players can't enjoy slow paced entertainment anymore.