Here, the 'cleanest' line of argument for plague themed cards being banned is: "MtG has plague themed cards, there is a current pandemic whihc is bigger than any other recent pandemic, I know somebody who died becuase of the pandemic, I'm angry at any reminder about the pandemic, ergo, I am angry at WotC for having cards which remind me of this." This is very clearly a stretch, as the same argument could be that the game in general depicts death and somebody might be upset about the death of a loved one (from a COVID unrelated issue)
Chaos theme includes Averna, enabling land ramp with Cascade mechanic, using Chromatic Lantern for mana fixing
It is not surprising if some cards are being manipulated for money laundering, he adds
While not the most potent hate card, Mare does substantially disrupt the opponent and/or protect against Burn's gameplan, depending on how you evaluate lifegain
Swinub (Space-Time Smackdown) is not available in Rare Packs