I also think that the Star Forge should have been an invention of the Sith species or of the TOTJ Sith Empire instead of introducing the Rakata. Korriban was never stated to be the homeworld of the Sith species before KOTOR, so if they used the Sith species in place of the Rakata, they could have said that Korriban was just the only colony of the Sith species that the Jedi Exiles knew about and made the tropical planet at the end a colony that was founded before the Korriban colony and where the Sith species still thrives. If they made the Star Forge an invention of the TOTJ Sith Empire, they could have had the “True Sith” mentioned in KOTOR II turn out to be ruled by the Dark Lord who tattood Exar Kun and Ulic Qel-Droma.