These units are good units to fill in Warlord Slots so they can go up against bigger factions.
No, they're not. Most of these ships were experimental only, never actually going into production for anyone. Some are out of the timeline of the mod so wouldn't be used even if they were production ships. The production ships in that pic are almost all in the mod already in some capacity. Everything else has no reason to be used because, they simply were never put into full production and usage.
With 1 exception, the ships in that picture that were actively manufactured in the timeline of the mod (Tie/Ln, Tie/In, Tie/D Defender, Tie/D Droid, Scimitar Assualt Bomber (not a tie, single engine), Tie Raptor, Tie Hunter, Chiss Clawcraft, Century Tank) are already in the mod.
The T.I.E. fighters are inferior to the Tie/Ln and older.
The Tie experimental mk(x) were never flown by pilots, they were drones.
All the recon, shuttle, scouts are less effective than a standard Tie/Ln.
The Tie Lamba & Tie Torpedo bomber are, to my knowledge, fanon only.
The Phantom was INSANELY expensive due to it's cloak, and never went into full production due to it's cost and difficulty in acquiring the crystals needed for the cload
The V38 was only created to have a ship that was the basis for the Phantom, and I don't believe it's ever been seen in universe as itself.
The various Bomber variants all had more damage inflicting potential, but were never used that much, and generally were even easier to destroy because of their even larger profile.
That basically leaves the Tie/ad Avenger, which I do wish was in the game as it's my favorite superiority fighter, but it was rather rare, so I understand why it's not, the Opressor and Agressor which were super-low production ships that were insanely expensive, although very effective.