This is a bit delayed, but you can still get the 1 talent point and Vord Emver as of Jul 16th, 2020 in Definitive Edition. I didn't free him initially and encountered him in Lucian's tomb. Kajun Frozenheart dropped the crossbow, and on killing Karon his spirit appears. I talked to the spirit with Lohse (my main) and got a Mystic tagged dialogue option. After that there is a speech check with Int, Finesse and one other tag. I chose Int and failed with 42 int and 5 in Persuasion (needed 6). Reloaded the save and buffed her with Encouraged and Peace of Mind, ended up passing that, and got the talent. I'm not sure if it works without the Mystic tag, though.