I never finished DoS2, was it a massive branching epic story? Or was the gameplay/companions/coop more the focus?
It was definitely lengthy. What you have seen playing, is more or less what the whole game is.
There aren't really big choices to make, outside picking your ending slide if that's what you mean. You can cut yourself from content, of course, through free systemic nature of D:oS2. The biggest branching content are companion quests.
