At a time like this, close to the release of the next Star Wars movie, let's take a step back a see how Mass Effect was created.
Even if KOTOR was one huge success and a reference, BioWare took the decision to give this licence to another developer and create something else. Mass Effect was born. They abandoned one golden franchise and took the risk to do what they thought was right, creating one of the most successful serie ever created !
https://www.gamasutra.com/view/news/311559/Why_BioWare_decided_to_create_Mass_Effect_instead_of_Star_Wars_KotOR_2.php