That's the overarching issue: the to-be canon FemShep is ultimately what the masses want rather than what the developers would deem "appropriate" for the game. As per the first installment, the "appropriate" FemShep has already been selected, and I'll give BioWare credible props for making her look more believable than many other female video game protagonists. Hell, she's more believable than ChauvShep's Cro-Magnon-inspired space marine pastiche.
With the FemShep candidates, all of the options have been based on analyses and aggregations to what "the public would want" as a FemShep, rather than what everyone would be perfectly a-OK with if they just stuck with the default. It's an "ideal" FemShep, and elicits feelings on what would be the "ideal" woman in player's minds, in this case Victoria's Secret Model #L45J1.
Sometimes, the people can make stupid decisions, and ultimately it's better if the developer just makes up their own appropriate design rather than listening to any other bloke. It's why we often can't have smart things in games (or any mass media), because the "what's popular must be right, right?" mentality caters to the perceived lowest common denominator. It's lowering the bar for a trope's sake.
As do I, but the thing about default FemShep is that she isn't hypersexualized and is actually believably-designed. With this contest, I'm given a predetermined render of six variations of the same face, and am asked to pick "what's the best?" Apparently "what's the best" implicitly corresponds to "what's the most attractive", and in this case the sample population seems seems to favor the protagonist's typical blonde love interest. By this reasoning, I guess Dr. Chakwas should also be in her mid-20's and have a C-cup. Mm.
Yeah. But they didn't have to pander to f****** everyone. It shows some sort of insecurity with their already-decent standard for FemShep, frankly.