Fighters are a fun option for a very different Star Trek campaign, with the characters being more akin to the Viper Pilots of Battlestar Galactica or the protagonists of Space: Above and Beyond. Plus it was an opportunity to tease a certain large ship from Star Trek: Invasion that will be written up sooner or later. While arguably the attack fighters seen in the Command Sourcebook, Peregrine fighters are the default fighters of Star Trek Online.
Additionally, non-Federation factions also lack small craft, including the Scorpion fighters seen in Star Trek: Nemesis. However, it omits a few key shuttles, such as the iconic shuttlepod of the Star Trek: Enterprise era. The Core Rulebook and the Command Sourcebook contain an assortment of small craft.