Chapters 1-16: Choice is a lie.
Here is an example of a choice that matters: Caesar at the Rubicon......if he stays on his side, following the orders of the Senate, the Roman Republic survives. Instead, he crosses the Rubicon, defying the Senate, the Roman Empire is born.
We should have been able to kill Arcann at the end of 16. Despite the need to have the subtheme of redemption (i.e. Ep. 6), Vaylin still could have partnered with Scorpio and the story could continue ad infinitum. Instead the only choice the players had was to hurt Koth's feelings so he would runaway only to return and steal the Gravestone. Nuts.
There were some shining moments in the chapters that were enjoyable. However, being told that your choices matter again when they actually don't is bogus. SWTOR choice is a lie.