As a huge CIS-fan and player, here are unit-suggestions you could think about for the future :)

Space:

-NV-C73 Tracker fighter,
-Manta Snubfighter,
-CIS-Advanced starfighter,
-the Recalcitrant-class light cruiser,
-the Umbaran-support ship,
-the Separatist-Star-Destroyer,
-the Bulwark Mk. II and III
-the Geonosian Dreadnought,
-the Sacroth-class destroyers and frigates
-additions to the Sabaoth-fleet (like the Sabaoth frigate)

-dreadnought versions of the providence, rescusant and pinnance


Ground:
-Chameleon-Droids,
-LR-57-Combat-Droids,
-B1-Battledroids mk. III
-Aqua-Droids,
-Assassin-Droids,
-Flitknot-Speeders,
-T4-Turret-Droids,
-Defoliator tanks,
-Scorpenec-Droids,
-Droidekas mk. II and III,
-B3-ultra battledroids,
-Advanced-Dwarf-Spiderdroids,
-D1-series aerial battledroids,
-MAF-Gunships,
-Heavy-OG-9 Homing-Spiderdroids,
-IG 110 lightsaber-Droids,
-Vulture-droids,
-Umbaran-Hovertank,
-Umbaran mobile heavy cannon,
-the Umbaran-crawler-tank,
-the Seismic-Tank
-Skakoan, Gossam, Quarren and/or Neimodian specialist commandos



Space Heroes:

Admiral Kirst (Battleship Starcrusher),
Nute Sambor (Sacroth-class destroyer),
The sisterships of the Invisible Hand (Lucid Voice and Colicoid Swarm),

Pors Tonith spaceship-upgrade to his Lucrehulk-battleship "Corpulentus",
Mar Tuuk spaceship-upgrade to his Lucrehulk-battleship "Procurer"
(It feels kind of wrong when they command Munificents and Rescusants :D)

...


Ground Heroes:

Savage Opress,
Lok Durd (Defoliator tank),
Cydon Prax (with his personal special tank),
Dart D`Nar,
Oro Dassyne,
Alto Stratus,
...


Thanks for reading :)