I know that the L1 ability of the GOOlock does not really translate given that the only character who gives evidence of speaking a foreign language is Lae'zel, but having played a GOOlock with Wyll also in the party, I really noticed him constantly getting his dark one's gift bonus from finishing off enemies and my getting...discordant whispers and Tasha's uncontrollable hideous laughter. Fine spells both, though I dislike 5E's "new saving throw every round" mechanic, but I'm not sure they make up the difference. I understand that the L10 ability (resistance to psychic damage) is likely to be outrageously good in this game (assuming the BBEG is an illithid or has illithid minions), but at low level it feels an awful lot like "I made my life more difficult for RP reasons". The telepathy ability at L1 is both irrelevant due to the decisions Larian made re: language and probably difficult to implement in any other way, but is there a plan to implement some L1 bonus to replace it? A bonus to rolls to resist your parasite or something?
btw, greatly enjoying the game and not understanding why other people are complaining about the NPCs - possibly because I'm RPing a sociopath we get along fairly well.