The Mordu's Legion ships as proposed are fine. However...
The Barghest could benefit from a slightly increased damage bonus (+7.5% vs. +5%).

As previously mentioned, I would still like to see a unique trait with these ships - such as the SoE line. I'd originally suggested a change to the reload time, but I think an additional role bonus to ammunition capacity would be preferable.

Garmur ... +25% to missile launcher capacity
Orthrus ... +50% to missile launcher capacity
Barghest ... +100% to missile launcher capacity

The SoE ships have multiple role bonuses, in addition to Covert Ops and logistics capability, Angels have an integrated warp speed bonus, Guristas have an integrated passive shield recharge and Blood Raiders have two race bonuses. Blood Raiders and Sansha also have Marauder-style weapons that result in decreased capacitor use. Mordu's Legion ships aren't the fastest, most agile or have the smallest signature - so a boost to ammunition capacity would distinguish this line from everything else.

Just an opinion:. They must had thought as any fuelled vehicle, in order to go too fast, you must maintain high fuel-flow, hence increasing the amount of fuel burnt-per-time, thus hastening fuel consumption and reduce its up-time.