Paraphrasing:

Severe Performance Outliers

Pot of Extravagance and other generic draw cards being overused.

Excessively Used Generics

Mostly draw effects, “Special summon and get a card” monsters and Solemn Judgment and variants of it wearing a new hat.

New Legacy Support Getting Points Already

The Fallen & The Virtuous

Spells Overcosted To The Point Of Not Being Appealing

Mirage of Nightmare, et al.

Themes Not Used

There were various themes used internally that KDE staff expected players to use but did not anticipate the conservatism of Duelists to shy away from them due to point costs. These will be adjusted.

Extra Deck Cheat Cards

Poor Bahamut Shark.

First Turn Kill Combo Pieces

Various cards were used to try and enable consistent First Turn Kills. None succeeded by they’re considered gnats and annoyances, so they’ll be hit to send them, and I quote, to “The Unrealistic Clickbait Combo Dimension”. Which as we all know is the 5th Dimension in the conflict in Yu-Gi-Oh! ARC.

Cards That Make Judges Cry And Play Lacrimosa

Question. Question is the poster boy.

Source