I'm sorry, this could be taken as a bit mean spirited but I mean it in the most literal of terms.
If $80 constitutes a "huge paywall" for you, perhaps you have more pressing concerns in your life than the next alternate hero skin.
Blizzard has earned my dollars for many many years dating back to Warcraft 2, and they are the last company in the world I'd be pissed to fund. No one seems to want to say it, but without people buying packs and other offerings, the game does not exist. Furthermore, in what walk of life is it not assumed that spending more money gets you more stuff?
If you plan on buying packs for this expansion, you should buy a bundle (it has the best cost:pack ratio). If you don't . . . perhaps consider saying thank you to the first guy you see rocking mecha - Jaraxxus. That person helped fund the game you seem to care about enough to bitch about pricing models.
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Battletag: MagicalBS#21852
Region: EU
Trade only?: Yes, you go first.
DONE