Generally the idea is that when there is a very powerful archetype in one expansion, we try not to give that archetype additional powerful cards so other archetypes can catch up. I think the fact you state here has more to do with intentionally not making more powerful cards for Odd Paladin than it has to do with all the cards in Odd Paladin being so powerful they could never be reasonably replaced.

The thought was essentially that Dreampetal might improve Maly and Togwaggle a small amount, but not enough to be more powerful than decks they already had like Token Druid and Taunt Druid. I think without Dreampetal and Floop, there would probably be less variants of Druid. You can argue that is good or bad :).

Considered both actually. Odd Warrior is a deck that I think is cool if it shows up in a very specific meta then goes away. If Odd Warrior were to find a long-term place in the 5-10% play rate range I think it would be time to seriously think about a change to the deck. For Odd Paladin, it's the best deck in the game on most days. As 'best decks in the game' go, I'd say it's not so bad. There are some clear counter strategies and most games have a good amount of interesting minion combat. The downside of course is that it's been around for 8 months or so and that's a long time for any deck to see a very high play rate. For now, we're still in the set evaluation phase, the meta from a data perspective is still changing every day.

Ideally every class has something in the tier 2+ range every set. For Druid, I think it's just that cards like Wild Growth, Nourish, Swipe, Naturalize, Branching Paths, UI, Plague, Spellstone, Malfurion, etc make up a core that is very good and has been around for a long time. There is some player fatigue with anything that is powerful and high population for a year+. Mike has mentioned this before, I think it's likely we'll do something to address Druid decks feeling similar in a way that is more long-term.

Yeah. Something we have to consider when thinking about card changes is what the fallout might be. It's a little scary to consider that a change to Odd Paladin might result in something like Kingsbane Rogue being the most played deck. While I love Kingsbane as a card and deck, I don't think it's the kind of strategy that is very fun if it's the highest population deck for an extended time period.

Both odd and even are fairly aggressive or tempo decks. It'll be difficult to make powerful aggro/tempo cards in paladin next year, but there is a lot of space outside those archetypes. Paladin also loses a ton to rotation.

We come back for two weeks of balance focused playtesting pretty close to set release. We also do a lot of playtesting, so even if we're 2-3 sets ahead, we've been playtesting each of those individual metas for a couple months each (in addition to other tasks). For example, most all card design is complete for the first set of next year, but we'll wait until Rastakhan meta has settled to make all final balance decisions for that set.