One dimensional villain , not too deep? U are either trolling or havent played Sith Warrior's story past lvl 10...
Darth Baras is prob one of the best characters on Empire side in SWTOR
He managed to trap the Emperor, plant spies in both Empire and Republic that worked for him for decades , plant double agents , trap Emperor's lover and managed to steal visions from her to work his goal , ruin and kill his master aka the feared Minister of War who opposed almost everyone when Treaty of Coruscant was signed(testament of his power) , elevate himself to become Voice of Emperor while blackmailing/influencing other members of Dark Council to support him + his sister was the best assassin Empire ever had
And lets add that BioWare implanted a tribute to Darth Vader in him which u can encounter during Hoth class mission where he says something along these lines "U failed me for the last time" proceeds to choke Imperial officer over holo and hands command to next one in line (sounds familiar?)
Only reason why Baras didnt succeed in his plans was because BioWare wrote the story of us players taking him down and thats prob the only flaw in that story.