From what I can tell, a lycanthrope is much weaker in its full beast form than in it's hybrid form. Excluding the werebear, a lycanthrope cannot use multiattack if it is in beast form, it can only use it in hybrid or humanoid form.
The werewolf for example, only gets one attack on its turn if it is in beast form. On top of this it can only claw at people, can't bite. And yet it can bite and claw on the same turn if it is in its hybrid form, which I find very confusing. It seems to me that, unless you are like a level 20 barbarian for example, the body of a human would not be stronger than that of a werewolf in beast form. Which would mean that the hybrid form should be weaker than the beast form. Can someone explain to me why this is not the case?