So I have reason to believe that the powers that be hate my guts, because I have managed to get through every single companion quest up to grabbing each and every advanced mod kit for all of the companions... But for some godforsaken reason, Tristan's final quest has not registered that I already met up with Virgil, as I am stuck on that step in my questlog.
As a result, Tristan is now under the assumption that we still need to meet up with his brother-in-all-but-blood, even though we've already gotten that rigamarole sorted. As an aside, Inez and Aza have a morker indicating that they wish to talk, though Inez' dialogue for clearing it is nowhere to be found, and Aza seems to not be willing to entertain the slightest attempt to speak on her personal life.
I feel myself to be at my wit's end, and wish dearly that there was access to some form of command console to actually progress my last companion quest so that I don't get an Arbiter's Hammer smashed into my skull.