I'm on the same boat, all doubt about that pack. Gears are more important than stars, so having a phoenix toon at 7*, but at g7 is enough for Thrawn 7*? Otherwise, better invest on gears with that money and have them 5* but g9 for example.
Wish for some idea on the current phoenix event, if u beat the last tier and all your squad survive, that means u will be able to reach Thrawn 4* maybe 5*?
As said Thrawn doesn't seem to be a big meta changer, so get to think if u really need him at 7*.