Overload is still an awful mechanic in HS but that doesn't mean they can't make over powered Overload cards.
Just like how Mysterious Challenger is an awfully designed card but is still over powered garbage.
I said numerous times in this thread that Overload is essentially a "borrow mana" mechanic, and in that context it is quite good. You have to plan your later turns a bit based on how you overload but the mechanic, in theory, is a good one. It makes Shaman a bit of a swingy class in which you can have powerful early turns that move into weaker turns, and having that variety is good for the game.
The "problem" of Overload, and why people disliked the mechanic, is that Blizzard tended to think that borrowing that mana meant you needed to pay
interest on that borrowed mana. Cards like Lava Burst, Dust Devil, Forked Lightning, and Stormforged Axe were overcosted or poor once you took the overload costs into account. Totem Golem was a step in the right direction for Overload but even after that card, people were blaming overload
as a mechanic as the cause for Shaman's woes.
This is also why you started to see Blizzard throw out more Overload synergy cards like Lava Shock and Tunnel Trogg, because Blizzard started to absorb the "conventional wisdom" that overload itself is a bad mechanic and that the way you fix it is by printing more
cheater cards that take
advantage of overload costs. But even that wasn't enough for a lot of people.
Flamewreathed Faceless is essentially pushing the boundaries of overload. If overload is as bad as people say it is, then Flamewrathed Faceless is balanced because just throwing out a "pile of stats" is not justified because you're going to be overloaded next turn. Side note: People also often dismiss cards that are a pile of stats, so there was double the reason for people to potentially dismiss the card based on what conventional wisdom said.
As far as I'm concerned, everybody who called overload a bad mechanic is to blame for why we got cards like Flamewrathed Faceless and Eternal Sentinel in the same damn set. Blizzard started drinking the Kool-Aid that the community was providing. Instead of saying "totem golem is a great overload card, this is how you do overload correctly" people went "lol remember when people said totem golem was a great card before TGT was released?"
