Very very true, and this is part of the reason why I decided I liked Gandalf better than Treebeard earlier in this thread. But Gandalf can't fit into as many decks as Treebeard because many decks can't handle the threat. Also, if you are putting them into a deck that quests very well but is weak at combat, Treebeard being able to do 2 combat actions sometimes makes him a better fit for that deck.
Generally I would prefer Gandalf if you can deal with his threat cost, but Treebeard can certainly be a very good addition to many decks that would implode with Gandalf's presence.
Agreed. He is certainly a good alternative. After all, he's a well designed card.