The tadpole in your head theme is basically the exact same thing as the collars in D:OS2 as well.
It thought this as well, but then realized it's actually the opposite, isn't it?
Tadpole = source.
BG3 is build using D:OS2 framework, that much should be clear by now. I am curious how far it will go.
End of act one = revealing the true nature of source/tadpole and killing of spare companions.
act 2 = semi open enviroment with/in a big city as we pursue Macguffins in order to fulfill our tadpole/source related destiny.
act 2 ending = fake finale, with a showdown against killed off companions and an unexpected low point of our characters journey
act 3 - real finale wrapping up companions story archs and facing their personal antagonists, and final dungeon of the game, with possible plot twist antagonist from previous titles (it's been resurected Bhaal all along!).
