feed also on animals(lore wise)
Lycanthropes have never been able to feed on animals as a gameplay mechanic in TES series. In TES II: Daggerfall, as a Werewolf/Wereboar, you would automatically transform and had to kill a humanoid once or twice every month, otherwise you'd begin to lose max health, all the way down to a crippling 4 max health. Hircine's Ring prevented this. In TES III: Morrowind (Bloodmoon), you had to kill a humanoid once every night, or once again, you'd take health damage. In TES V: Skyrim, in order to maintain your Beast Form, you have to feed on a humanoid corpse. The very curse of Lycanthropy, is that you are compelled and must feast on a sentient race in order to satisfy your hunger and remain healthy. It simply wouldn't be the same if you could feed on animals to bypass it.
Couple things korbu: 1. Werewolves have high health and high damage to make up for the lack of armor. So will the werewolf summon.
Having a huge healthpool really doesn't make up for the lack of damage mitigation, just ask anyone who's played as a Tank or Healer in an MMORPG. A tank with high damage reduction, is almost always better than a high health tank, since the high health tank will actually
require more healing than the damage mitigation tank. I'm not asking for Armor Cap in Werewolf Form (I've seen how ridiculous that is with Resto glitched Fortify Alteration potions with Dragonhide up right before transform), i'm just asking for like 30-40% damage mitigation in Beast Form.
Mammoths cannot pivot on a dime very fast. I have utterly destroyed mammoths as a werewolf. As far as dragons vs werewolf, you have to be more realistic. A werewolf or vampire lord for that matter is not a god. It makes perfect sense that they would stand no chance against an ancient dragon and I bet you that even still a clever wolf with the perks could probably take one out even if its not easy. Both forms are meant to be supremely popwerful and be able to kill a hell of alot of things but they are not invincible or completely unstoppable. If you want that you can toggle god mode via console honestly

The important thing is that a werewolf can take out a vampire lord if they are smart and vice versa. There are gonna be more powerful creatures than them for sure though.
I've seen the Mammoths in my game pivot pretty fast, which when combined with that wide radius head swing they do when i try to strafe around them, it hits me pretty often and hard in Beast Form. What irks me, is that my Lvl 68 Nord Warrior with 550 Health/320 Stamina/100 Magicka with this build http://skyrimcalculator.com/#133474 can take on Ancient Dragons quite easily (Which is why i downloaded the Deadly Dragons mod), but when i go in Beast Form against them, i practically get 1 shotted. But i gotta admit, my Nord is an absolute tank in Human form. Armor Capped, 70% Resist Magic/80% Resist Frost/30% Resist Fire/30% Resist Shock, plus i mostly use Mace of Molag Bal (Legendary, 108 damage) along with Spellbreaker (Legendary).
Sense when? the howl never had cool down before.
The Totem of Fear Howl and the Totem of the Hunt Howl don't have cooldowns, but the Totem of Brotherhood Howl does. Which the Totem of Ice Brothers and the Totem of the Moon looks to be upgrades to the Totem of Brotherhood.