I really wish they had tied Eveline into something established rather than something new.
I have a cursory knowledge of Resident Evil's lore, but Las Plagas seems like a good fit.
You could have it so that a new organization discovers the Las Plagas parasites. They decide to weaponize it, and incubate it in a human from birth for immunization and more direct control. Same basic premise, as Las Plagas essentially allowed mind control.
Eveline is a successful test subject, but suffers more and more side-effects, becoming colder and crueler due to the pains of the process and lacking a childhood. That would avoid the 'we made her look like a child to be a better weapon' weirdness.
Same order of events. Eveline goes AWOL, Mia goes after her, ship crash, Bakers.
But the mind control would be based on an established elements of the franchise (the Bakers are controlled by Las Plagas parasites that Eveline has direct control over). The Molded would be pseudo-Regenerators. Eveline's desire for a family wouldn't be because she's designed to blend into a family unit, but more clearly because she wants to live out a regular childhood.
Then take Redfield out of the game and have Leon turn up. They could remodel his face however they'd like but the hair, jacket and style would shine through, unlike Chris. "I'm Leon Kennedy, we were tracking down some Las Plagas samples and it led us here. What the hell happened here", or something. It would tie everything up nicely.