This is only a problem because the game gives your character no backstory at all. The custom PC should be given a set backstory that applies to all custom PC's, and we are allowed to customize how our particular PC dealt with that backstory. (See Mass Effect 1 for how this was handled with Shepard's backstory with a few simple questions)
Agree in small part with way ME1 handled backstory. All well and good but as I've stated in many similiar threads, it limited you. Sure it's not completely pre generated and hard coded there is room to wiggle around in. Yet what you have is only partially yours. Currently your backstory is completely yours, free to make up as you wish, making that character Yours and yours alone, no 2 people are going to come up with exactly the same one. If it is limited to simple choices like in ME1 there will be alot of people with the same backstories, so your no long playing a unique character. Your playing a character that 500 people are, or 700 or 800. Sure you look like some others, but you are unique because none of them has your backstory. A thing you can make as detailed as you want, or as simple as you want.
To me it's a copout, I don't want to put any thought into my character or there backstory do it for me. Well you just copped out, play one of the companions who they've aleady made, including backstories. If thats what you want, then do it. Not sure why your in EA, when it was stated they wouldn't be playable right away. But your here, great. leave my custom characters alone. So I can make my unique ones, and play with backstories and everything else that comes with it.