The Arfus doggy-deck is very strong - I had been playing it, 30 games today, and 13 of my opponents were also doggy-decks.
So that was repetitive, but I get it, the deck is fun, if you have some luck with the draw, you can play the legendary excavate minion on turn 4 or 5.
The Cthun druid deck is horribly slow - none of the druids I played against even managed to use their Cthun (4 in total druids)
The paladin dragon deck (Nozdormu) is also strong, it makes a faster paced paladin which is refreshing.
Bran Battlecry deck is random-crap-shoot.
So is the Mage-random (Kael) spell deck - but stronger than Bran by a lot.
Raffam is really weakened by lack of spells.
Compared to duels, not as fun, since duels allowed some player agency in choosing the buckets at least, since passives had became quite typical, and basically not even a choice with regards the basic deck we’d create…
And the best thing about duels being gone is no more bomb warrior — oh wait.
It’s back.
First impression: very positive, but it is good it will be updated with new decks in one month, but still removed in two months - because it will become repetitive, especially if you do not play all, or even many available decks.