The novels say, that Quarians are the most human looking species in the galaxy. Given how similar Asari look and how you could see that human-ish face under Tali's mask in the first game already, it was to be expected.
I don't really put much stock in what the Expanded Universe says (novels, comics). They've proven inconsistent with established lore (which happens amongst most franchises that branch out to other mediums).
Yes, the asari do resemble humans. The art book states they went for a typical sci fi trope of blue women. So they created an all female race that resembled human females with wet slicked back hair. (obviously, I'm not quoting directly....but I could if you wish). In which case I'm fine with. I don't mind bipedal races that have resemblances to humanity. What I do mind is that pretty much every race (besides the hanar and rachni) resemble humanity 'too' closely.
They wanted to have an alien love interest in the first game (ME1). Hence, the human features seen in Liara/asari. However, coming full circle with things I disliked, just because they made one alien love interest that resembles a human, doesn't mean every damn alien should be sexually compatible with humans. Like really??!! (It's one of the main reasons I hate fan-service. Things always get a bit ridiculous and usually end up too far-fetched/over-the-top)
Also, not sure what you meant by 'humanish' face under Tali's mask. All I see is glowing eyes and the outline of a nose....plenty of room to further 'alien-ize' her features.