I don't know, because Mia feels she was robbed of a normal childhood, it makes me think she didn't really get much say in her life or that she was happy with how she was raised. Maybe there will be other flash forwards that contradict that down the track but so far it seems like she had a sheltered but fairly lonely and crappy childhood. I get Felicity and Oliver obviously will have their reasons for that, but I feel like if Mia is being set up as a spin off character that they've sort of made Oliver and Felicity into "bad parents" in order they give Mia's story drive.
So much of the flash forwards could reach the same goal without having to crap on other characters to do so. Like Mia and William knowing about each other and having a childhood together from the start, working together to figure out why their parents are missing. But I've accepted we are stuck with the future we have got now I just hope they find someway to reverse it and not keep the future as is for a possible spin off.