I hope you enjoyed the ride. More to come
1.- That would mean more characters irrelevant to the (current) story and only having presence in the background story. Perhaps even confusing more players with the differences between patched/unpatched versions.
2.- Spoiler
3.- Spoiler
4.- If I change back Erika to redhead my wife will file for divorce
The age difference will be explained in game, but as Elhemeer says below, in your version Eva is 3 months older than Erika/Daphne and Amanda is 3 months older than Emma.
You are partly right and partly wrong. It will be developed in 0.12-0.13
It's not confusing, just a different background story