I wouldn't mind seeing what Quarians look like in general, but I dont really like revealing mysteries unless theyre done right and make sense for revealing them. I have a feeling that unless theres a reason that most fans want to see her face but have no good ideas for how to go about revealing it other than before sex in the fanfiction or just out of the blue with no context.
Personally, I've heard some ideas to do a Darth Vader when it comes to this topic. Mass Effect 3, includes many hard choices or even leaving your love interest behind or something horrible happening to them, before they die each has a meaningful last few moments with Shepard, each unique. For Tali's death, she dies wanting the last thing she sees to be Shepard without the distortion of her helmet- or something heartbreaking like that. It'll bring a rage from the Tali Lovers community, but hey- can't have it both ways if I were to have it my way. That and definitely makes it more meaningful if its in a characters last moments that something big is revealed.
It's sort of like the creator of FFVII saying that the fan outcry over the death of Aeris, wanting to bring her back or find easter eggs to resurrect her proves that he made the right decision in writing her character to die. I think the same would apply here.