Personally I would have liked to have seen 10 direwolves instead of 20 zombies in the box for more variety and balance the box out more, it would mean you would have every non-conditional battleline in one box for SBGL then which would be a great starting point for an army. It'd be tempting to buy two boxes also then if you got twenty wolves instead of 40 more zombies (who in my opinion arent amazing sculpts - especially with the duplicate poses where as the wolves look great and 20 would be pretty much mandatory if you were making a vyrkos list).
I guess really in the end it doesnt matter too much since you can either sell some of the zeds and buy the wolves if you really want them. I think aesthetically these collectable boxes look better with a larger variety of units rather than doubling down on certain ones though.