While Bioware hasn't officially added AA to the graphics menu, it is possible to turn on AA by adding it to the config. Make sure your game is off for this process.

%LOCALAPPDATA%\SWTOR\swtor\settings (folder, copy paste it in your explorer)
client_settings.ini (file)
AntiAliasingLevel = 8 (you need type it in file)
It is smoothing. You can change the number to 2, 4, 8 depending on your graphic card.

Viola no more jagged models.