You could argue it depends on your character build but, I don't see how becoming a werewolf actually can make you stronger. You can't use your weapons so any benefit of any enchantments or smithing gives you is out the window, You also can't sneak, use potions, scrolls, spells or your shouts. Immunity to diseases means nothing since they are so easy to cure and even if I really did feel the need to be immune or resistant to disease I'd use my enchanting skill or play as an argonian both of which are far more effective ways round it.