Think this is just a MCU thing. In the comics, and the games, she's her own person and a pretty powerful one at that. in the recent Guardians of the galaxy game, she's a powerful seer. Peter also isn't ego's son in the comics, but MCU does stuff differently, and that's fine for whatever they are doing in the MCU.

Like the guns in this special. Peter gets his guns from his dad (who is a king) by accident. But here, they are from Yondu (and the surrogate dad type).

changing it up is fine, and i'm ok with it.