If a game needs a walkthough to complete everything then I'm going to enjoy that game less. It's one of the big problems I have with the Suikoden games. Big fan, but it's annoying to rely on a walkthrough to get everybody.
I like a more balanced approach. Too much grind, and I'm gonna get bored or annoyed. If the game gets straight to the action then it's going to be a very shallow experience.