Re-reading the Xwing series on my kindle, I got the the part in the 1st book where the Rogues are escorting a Y-wing squadron in a ground attack only to find a Lancer drops into their exit vector with a Carrack cruiser. So it occurred to me . . . if during the Reunification War or later times of the SL, they did not build warships directly for escort/screen duty and we have that theory of the large cargo bays for supporting the flotilla to include DS with limited cargo space (The crew & troops on a Union for the four or eight month fleet movement are getting their rations, parts & water from that SovSoy they are riding on) . . . did they put DS out for fleet screen/pickets?
Honestly, in the Reunification War they had to break their way into some very tough system and orbital defenses where they lost significant number of ships and droppers. Surely besides building carriers they would have copied the Empire's solution and start spitting out Lancer- style escort dropships (faster to build than warships and more disposable- two of the big requirements for escorts). Like their bigger brethren they would have been wiped out in the Succession Wars- maybe surviving longer but once true warships are gone they would be too powerful not to use or group for use.
My first thought was to clone a Lancer- give it a BUNCH of IS LPL . . . but that would be later SL-era and would their be a more effective weapon to go after ASF, SC, mines, missiles, etc?