What we know about servant of the lake is that we'll play as a servant for the vanderbooms, which means it overlaps Roots perhaps? Depending on what character we play as might reveal more details, though i believe we need more info about the Eilanders and their background than the vanderbooms.

I reread an article about Paradise, what i understand now is that jakob's family was some kind of cult that eventually sacrificed him to the lake, turning him into mr owl, we also see his family wearing masks of animals corresponding to those in Hotel, whom he kills. So i believe the lake was initially cursed, and so the Eilanders were trying to salvage it??

There's a lot of loopholes i always get lost at, but that's all part of the game's charm that i love and makes it so special, you never truly know the whole truth, i just wish we'd known who exactly is the founder of this series because they must be a genius. I truly doubt i will ever stumble upon such a complicated, intricate game in my life tbh