Massively (via Darth Hater) points to an interview with lead game designer Gabe Amatangelo where he mentions that puzzles are definitely a part of the Eternity Vault in addition to five bosses or “encounters:”
“The Eternity Vault has five. It has five encounters. ‘Bosses’ is such a loose term. One of them, you have to hack this puzzle. You’ve got to split up the group, and you’ve got to fight back a bunch of different waves while people are trying to solve a puzzle in tandem.”
We first speculated that the Eternity Vault trailer that was shown at GamesCom contained a brief one second shot of a character trying to complete a puzzle similar to the ones that are found in the KOTOR series. We now have confirmation.