As others have alluded to, I think it may have been more prudent to address the major concern underlying this ‘anxiety’: power creep. From my understanding of the concept, I don’t see any issue of power creep from the currently revealed cards (i.e. a new card [in-faction] is not invalidating an old card [in-faction] that did see play). However, I do see some highly questionable decisions in regards to costing and rarity (e.g. Enfeeble, which I fully expect to be nerfed to 4 if not 5 mana by the end of Feb.).
Another salient point, doomsaying ≠ critical thinking ≠ optimism, and an appeal to CPG’s design authority does nothing but dismiss the concerns of others (rather than addressing them with reason). CPG has demonstrated its design fallibility many times, especially in their “hyperpolar” response to imbalance (e.g. Kron, Mana Vortex, Time Maelstrom, Shadow Nova, Siphon Energy, Zirix, Kara, etc.). Thus, there is reason to be somewhat wary, not full-on doomsaying, but nonetheless wary.