+1
I am definitely wanting the FCC or as close as we can get to this. My fear is that they will take away some of our options for this because too many people are complaining about Tav feeling unimportant. I think especially at this point, it is important to leave the option for a blank backstory. Add in options or even character templates for those who need it, but there are much better ways to go about making Tav special.
Fundamentally, making it work, e.g. by giving a Fully Custom Character a Personal Quest or a Most Important One status, can be done by focusing on choices made during the campaign, not on the Fully Custom Character's past. This has the advantage of going along with the idea of giving players agency, that Larian seems to care about.
This is a great way to do it.