izigame.me

The actual Wolf Wars area itself is incredibly lacking. It's a zone that can be completed in about 10 minutes, can't be done in multiplayer, and has literally zero impact on the game as a whole since you don't even do it with your chosen heroes. The only "replay value" of the area is checking the various paths and clicking on the canned dialogue for either Yogger or Magnus, and if you don't care about "the lore" then this is pointless to you. I'm sorry but I don't consider content I can read on a Wiki or watch a YouTube video about to be meaningful content additions.
So what does that leave you with? 5 skins, the "Wolfy" pet, and Yogger himself. (And a card back, I guess.) Let's go down the content list from least impactful to most impactful:

Skins

The skins are for...

Magnus (gives him cleaner armor and a nicer mane)
Heiner (sorta a magipunk golem look that looks different from his defaults)
Bree (makes her look more battle-hardened)
Andrin (gives him a very stereotypical Indiana Jones type look)
Thuls (Fish! His worst looking skin by far imo, but hey you might like it)
Reginald (stereotypical paladin / soldier look)
Ottis (a friar look as opposed to his typical head priest look, looks considerably less goofy imo)

Skins are obviously subjective and for what it's worth some of these (Thuls excluded) are nice. But honestly I think the skins from Obsidian Uprising are better (including a skin for Amelia if you bought her.) Obviously skins are inherently subjective since they're entirely cosmetic.
It is worth mentioning that of the 7 characters who got skins in this pack, three of them (Magnus, Andrin, Ottis) have free What If skins, three of them (Magnus, Heiner, Reginald) have Halloween skins, and two of them (Bree, Thuls) have Obsidian Uprising skins. I can easily see how this may detract from the value of this pack for some people.

Wolfy

Actually pretty alright. Expensive bastard (one of the most expensive pets in the game as far as I can tell) but he has a very consistent effect of granting substantial resistances to slashing and piercing (not bludgeoning RIP bozo) and casting Howl every other turn to grant Slow and Vulnerable. That can make for a pretty big impact in killing enemies before they act.
Howl is pretty universally useful. The resistances however taper off in the late game, which makes it kinda confusing how expensive Wolfy is. But certainly a good pickup on whoever your Row 1 is.

Yogger

Yogger is an interesting Warrior based on three things: buff stacking, health stacking, and being a fucking fatass (IE food cards.) His main gimmick is the creation of Meat cards that increase buff stacks on you (or your allies!) (spoiled meat not withstanding) and he has a lot of cards based on further filling up on food cards and taking buffs.
As a result of his focus on buff stacking he has a unique synergy with heroes like Grukli, Bree, Thuls, and Wilbur... I mean hypothetically. You can also just hoard all the buffs for yourself like a fucking fatass. Hell, he can even just take buffs from teammates which is just conceptually funny. He plays INCREDIBLY well with Malukah who already likes stacking Vitality and other buffs on allies, and in a general sense if your healers (and to a lesser extent your scouts and mages, but mostly your healers) are willing to pump you full of buffs you can go become a walking brick shithouse.
Yogger already stacks Vitality like nobody's business but most of the skills on his left tree are based on dealing more damage based on your max HP. His right tree meanwhile is focused more on passing out food buffs to others which can be helpful with the right team comps. Also if you can find a Fork, Exotic Spices, or (hilariously enough) a Salad for Yogger's stupid fat ass you can do really well.
I am also genuinely not kidding: the existence of his What If skin makes Yogger way more fun. Chef Yogger is goofy.

Would I recommend

Ehhhhh uhhhhh errrrr...
Yogger is fun. He (ironically enough) manages to do what Magnus attempts to do of being a combination of damage and frontliner much better, only he accomplishes it by being a walking brick shithouse rather than stacking defence cards, which can leave your team vulnerable.
Unfortunately beyond Yogger this pack really doesn't offer much: Wolfy is extremely "meh" (no particular synergy with any character build imo, kinda just nice to have) and the skins are purely cosmetic.
I think my ultimate summary of this pack is that it's worth if you play Grukli and Malukah, and is kinda aggressively alright otherwise.