I was wondering if a few of these ideas had merit.
Self destruct ability for the yevethan thrustships
Some of the old pirate units for zsinj to diversify him a bit more
Wraith and Rogue Squadrons in Hunt for zsinj(wraiths as just a commando unit, Kell with thermal detonator, Donos sniper, Face, Han type, Phanan as medic with heal ability, no space)
The population of Borosk should probably be loyal to the IR since it's a stronghold world
Perhaps a bit more emphasis on the importance of the cloning facility on Wayland in Thrawn Campaign. perhaps make infantry the Navytroopers seen in the PA with less health and firepower but more cost to show the IR's manpower drain while Wayland offers 1 cred Stormtroopers about the lvl of Zsinj raptors in damage.
Also if the Sluis Van mission could be done that would be quite interesting.