Exactly. Except add lunar transformations and enhanced abilities. But why do I get the feeling everyone wants the game to be easier? Really, transform back and forth to werewolf and vampire whenever you want? Eh..
Yeah, here's what I would add to werewolves:
Forced monthly transformations that last the entire night (can be countered with Hircine's Ring)
The ability to sneak
Ability to do a sprinting leap attack
(Silver weapons do more damage)
As for what they get in human form:
A slight increase in unarmed damage
Either slightly decrease the amount of stamina used in sprinting/power attacks or a slight increase in stamina's regen rate
Additional damage when struck by silver (increased stagger chance)
A Night Eye ability that can be activated at will
Stamina, Health, and Magicka don't regenerate when wearing Silver equipment