After having studied a couple of successful decks in the internet I get the feeling that those are mostly build around Gandalf and how to get him into play over and over again.
Those decks are usually: Sneak attack for a cheap Gandalf, Stand and Fight for resurrection of Gandalf, Dwarven Tomb to get Stand and Fight back and Will of the West to shuffle all these and all your Gandalf(s) back into your deck (that is 12 Gandalfs per shuffle). With Steward of Gondor out, resources are not a problem, Horn of Gondor makes Gandalf even cheaper. Add some cards for untapping - you guess right - Gandalf, so he can defend and attack. Then have some Lore cards for drawing more cards so that you get Gandalf(s) and those support cards even quicker on your hand.
So, since the game was published and the players had time to tinker with the cards most of the decks (and maybe even the game) turned into a "Gandalf cameo contest". Funilly, the rest of the cards dont even matter that much (as long as Unexpected Courage is included).
Am I too critical? I somehow feel that there wasn't enough playtesting when most "good" decks follow the same Gandalf-Structure. And it is obvious that Spirit cards are by far the best in the game (followed by Leadership) and Tactic cards are the worst of the four spheres.
Before you say now: "Then take Gandalf out if he bothers you". Of course I play the game to win but it feels a bit shallow that despite having four different spheres and many different cards it boils down to Gandalf if I wanna beat the game.