The (possible) references to KotOR I have experienced myself so far, haven't been very satisfying to be honest. The questline involving Revan on Nar Shaddaa wasn't terribly exciting. It must lead to something, but on its own, it's quite underwhelming. Then there's the Czerka storyline on Tatooine (Empire side) involving an ancient artefact, which was nothing special but gave us
The Imprisoned One, which I'm guessing is the Rakata from KotOR who uses riddles. Maybe I don't remember him that well anymore, but I'm not sure he was the power-hungry being he's being portrayed as in TOR.
I smiled when I saw the name Ulgo appear on Alderaan, though.