Here come my proposals.
Swift and variants :
-Swift: In service since the formation of the Federal Army, the Swift is now mostly used in training schools, by small corporations, by amateur aerospace racers, and by daring mercenaries.
-Swift-M: The Armada saw fit to induct a sizable number of Swift units to their interdiction fleets. The Swift-M is a common sight in Federation border patrols.
-Swift Mk.3: A widely-used craft for its time, the Swift Mk.3 remains a popular choice for mercenaries and aerospace racers alike. It has seen much action since the earliest incursions into the Precursor sectors.
-Kite-E: An attempt to revitalize the Swift frame, the Kite-E was a limited production type for the mass market. It is coveted by collectors and aerospace racers alike.
Hawk and variants:
-Hawk: Originally designed to contend with Imperial reconnaissance units, the Hawk was among the first Federation craft to ply the Precursor sectors for its secrets.
-Hawk-Eye: Building on the Hawk’s success, Vanguard engineers made refits to the design. Though it performed well in combat, the Hawk-Eye saw limited mass production, and was decommissioned early.
-Hawk-M: This overhaul of the Hawk frame proved to have excellent hit-and-run capabilities. It remains a mainstay of the Armada’s raiding fleets.
-Blade of Aressa: Built as a weapons testbed, the Blade of Aressa surpassed expectations in such a way that Armada engineers went forward and used it as a prototype for their own Hawk variant.
-Superkite: In the wake of the Kite’s mass production, Federal engineers still believed that the Hawk frame’s capabilities could be pushed further. The prototypes for the Superkite met with ill fates during testing, and the type saw limited production.
Dvergr and variants:
-Dvergr: The original Direktorium design, while capable, was quickly superseded by Imperial design refits. The Dvergr is now a rare sight in Imperial space, only being used by low-end contractors.
-Dvergr 2: The Dvergr 2 was the mainstay of Imperial interdiction and reconnaissance units during the Empire’s first wars against Jericho. Though an aged craft, it is still put to good use by many mercenaries.
-Dvergr Knight: Hastily given overhauls by engineers of the Wardens Order during the First Bartle War, the Dvergr Knight served alongside the Dvergr 2 and earned its reputation as a capable interceptor. Many Imperial aces of the period earned their wings with this craft.
-King Dvergr: Designed by Imperial veterans and aces, the King Dvergr was an excellent reconnaissance unit and a superb dog fighter. However, it did not see widespread use as its production was cut in favor of the newer Dwarf frame.
Trooper : Originally an armored personnel carrier, the Trooper was refitted by Imperial forces into a line warship near the end of the Third Bartle War due to its limited success. It has proven to serve better in its new capacity.