How Tali looks will not change how I view the character. Hell, in ME1, my video card was so poor I didn't even know the mask was transparent but I still loved the character. Tali's traits and the quarian story really sound like good, solid, science fiction and I love that. The asari, well not so much.
As far as the helmets, males could have longer faces, don't know. The description in one of those books (not canon) did not mention that yet with the description given about the ears I'm fairly sure it would have been. Still, no point in arguing as Wolf stated. Until BW pulls it's head outta it's arse and gives REAL data on a race they said 'Oh looky' to with no info, all we can do is wait.
And Wolf... Gonna have to wait to find out