I gave a zeta to his unique, so fracture can work better.
About Thrawn lead, indeed is good. But after running some tests on GW realized that the juicy part is 20% TM gain whenever suffer a debuff, and there lies the problem. Meta team is all about cleanse, so u won't get much debuff during the battle. Was cool when i faced a sith squad and vader landed 5 debuffs, all my empire jumped 80% TM so sweet!
That's why i think against the current meta, Thrawn is better as support than leader.