6 is an awkward number.
There's a lot of removal at 3 power or less and a good amount at 5 power, but not many beyond 5. Alzur's Thunder is one of the few options available, but most of the 3-5 power removal cards still leave some power on the board, so it doesn't end up being a direct 1:1 trade like thunder. If you're forcing opponents to burn a card/premium removal like thunder on Savage Bear, SK definitely comes out ahead of that trade.
I think after this patch skellige are the op faction. That bear and soldier that gets boosted for every damage you do vs an enemy combo is too good. Also because of the bear I think it makes queensguard op since they always have a damaged unit to summon themselves