Not sure where to post this, since the events happen mostly when fighting Top 50 decks.
#1. Multiple sundial spam
Rather than sensibly putting out one Sundial at a time, and the next a turn or two later, I'm seeing Time decks putting them out 2 and 3 at a time, wasting their stasis function.
#2. Shield after shield after shield
Why on Earth does the AI play 2 or 3 shields in the same turn? My last game, I saw Dimensional Shield, Bone Wall, and then another Dimensional Shield, all in the same turn. And that was one turn after the AI used a Steal card to swipe one of my Bone Walls - erasing his own stack of 11 or so Bone Walls he had at the time.
#3. The Otyugh lost its' appetite
Several times, I've seen the AI play a single Otyugh or Elite Otyugh early on, and then it never eats a thing despite havng the quantums to do so.