Because Book Seven reminded me and so I have this in one place for future reference: the epic quest line for The Lord of the Rings Online™ Volume One: Shadows of Angmar™ is weak because the players are observers, not protagonists.
You start by following the Fellowship, and that works well. You fight alongside them. Once you accept that you will not get to be Legolas, this is the next best thing, and this is what you paid for.
Then you enter the main storyline, and you are helping the real protagonists complete their story in Angmar. While you are sent to fetch a horse, gather scrap metal, and buy honey (all real quests in the epic line), they get the killing blows on the bosses. Almost every Book ends with the PCs paralyzed, watching NPCs act out the conclusion. This starts in Book One, where Tom Bombadill is a kill-stealing jerk, and continues through to Book Fifteen, where you do not even have camera control at the end.
They are also weak on gameplay, because someone decided that it is not an Epic quest chain unless there is more than an hour of travel. But that is symptomatic of what you are doing: running errands for the real heroes.
The Books in the game at retail release were lighter on background but they had better gameplay. The ones added later were killing time until the expansion, it seems, and they killed a lot of time. It is a neat story, but it is just that: a story, not a game.