I remember hearing about a bug in the original thrawn event with his AI which got fixed shortly after the first event. Since this would have obviously made the first event way easier that means that t...
The only change they made was to make him prioritize Fracture over his cleanse which he already did in the event last time (I got him to 6* last time the event came through).
I used my arena mods last time and this time I didn't. I omega'd all uniques and increased the gear levels on Ezra and Sabine.