To expand more on Morrigy, their fleet speed is a bit arcane and depends not only on drive, but also:
How many ships -- 10 max per ship size , (20 with top engine technology), the more x10 ship sizes the merrier.
Is there a special speedboost ship.
How big are your ships (fleet made fully of smallest ship class <<<< fleet of medium)
Combine all that with the fact that Morrigy get reduced planet income, expensive, fragile ships, but higher trade profit, and yeah it's not a very beginner friendly faction. Cruisers do look cool.
Liir, have the distinction of being the only faction that utilizes non-newton movement in battle. i.e. they don't need to fight inertia during turns since technically they don't "move" anywhere.
Overall with different tech RNG, different drives, weapon loadouts, "unique factions" really are unique.