I sometimes feel that way too, but I've come to really appreciate it. I don't always have long stretches of time where I can sit down and play a game, so having so many things available at once means I can pick one that looks doable in the time I have. I can just pick a sidequest that looks interesting or explore a new area without worrying I'll accidentally start a giant plot relevant quest when I have 15 minutes, haha.
I had this 'problem' when I started playing Skyrim too. On my first playthrough, I felt so overwhelmed, like I had no idea where I should go. I put the game aside for months. Eventually I just picked it up and plowed through the main quest. Now when I go back to Skyrim, I take it slow and get into the roleplaying, doing quests with a certain character in mind, and just let myself get absorbed in the atmosphere. Sometimes I make a new character just to do one questline (thieves guild, for example). It becomes a new experience every time.
I'm hoping that all of this content opens up the same thing with DA:I; that after I finish my first playthrough, I can take my time and really dig in.