So thinking about Great Old One patrons. They give you Awakened Mind at 1st level that is missing.
Awakened Mind
Starting at 1st level, your alien knowledge gives you the ability to touch the minds of other creatures. You can telepathically speak to any creature you can see within 30 feet of you. You don’t need to share a language with the creature for it to understand your telepathic utterances, but the creature must be able to understand at least one language.
I think they are use to using telepathy and seems like they should get some GOO dialog choices? A GOO Warlock would just love the tadpole and be looking for ways to control it. Heck, make the GOO patron an Eldar Brain and let them just dive into the Mindflayer plot.
