I'm pretty happy we're getting a younger protagonist, and since the game lets you be male or female, the gender isn't an issue. I'm glad they're using femryder in the promotional stuff since Maleshep was so front and center until around ME3. It's a nice change of pace.
I don't really care what happens as long as the story is good. Does Ryder come to command a small group or even a ship? Fine, long as it's not too nonsensical I'm ok with it. It's sci fi, rules will be bent a bit here or there. I'd rather judge the characters, and the story, more based on it's merits than just go "wow that person is young." I'd rather look at it as how we got to that point and what it does after.
Kinda neat seeing someone having to learn and grow, and thematically it makes sense since we're in a new galaxy ourselves so Ryder is a perfect viewpoint for us to experience it together.
There's been a lot of overreacting for so little an amount of information, I get that people care about the game, but we really have zero clue to a lot of what's going on. Other than being in a new place getting to see new things, which is awesome =D