I agree with you, but it's still worth getting. If nothing else, just for the simple fact that it means you killed all 8 dragons. Meteor ain't bad, and you learn it fast...Odin teaches it to you, but I believe it's slow, and (SPOILER)if you get Raiden (which I would definitely suggest), you have nothing else that teaches Meteor except for Crusader. Merton, I never really liked, but as was pointed out, if you equip everybody with fire-absorbing equipment, it will cause damage to the enemies and heal your own characters.

Plus, I don't like empty spots in my Espers list.