While I'll admit that after the OP brought this to my attention I thought the pattern looked wrong, I'm not so sure that is the case. A quick Google search shows images of foot prints that are on the same angle as in the game trailer AND the type the OP wants.
I'm sure there is a natural range of variation, but I'd be curious to know what the "normal" or "optimal" pattern is and if that varies due to terrain (snow, pavement, sand, rugged terrain, etc.).
For the record, I can't use my own pattern for anything other than the potential "abnormal." I was born with my feet facing 180 degrees from each other and had to sleep in braces until I was one or two to correct it. While I walk "normally" now, my feet (and knees) do still want to point out at angles instead of straight ahead. Also... completely flat footed. So I have no idea what normal is anyway.
I would think that FDev would've researched all this before the modeled walking into the game. So my initial reaction is they got it right (even if it seems a little weird) and the OP is wrong. I'm sure we'll find out eventually. Any podiatrists on the forums?