Saud, apart from anything else, the covering of the face is insupported. Here's an extract from wikipedia that quotes the relevant ayaat:

"Islam's holy book, the Qur'an, orders Muslims to dress in a "modest" fashion. Following verses are generally interpreted as applying to all Muslim men and women.

Surah an-Nur ayah 31 states:

And say to the faithful women to lower their gazes, and to guard their private parts, and not to display their beauty except what is apparent of it, and to extend their headcoverings (khimars) to cover their bosoms (jaybs), and not to display their beauty except to their husbands, or their fathers, or their husband's fathers, or their sons, or their husband's sons, or their brothers, or their brothers' sons, or their sisters' sons, or their womenfolk, or what their right hands rule (slaves), or the followers from the men who do not feel sexual desire, or the small children to whom the nakedness of women is not apparent, and not to strike their feet (on the ground) so as to make known what they hide of their adornments. And turn in repentance to Allah together, O you the faithful, in order that you are successful

In the following verse, Muslim women are asked to draw their jalābib (when they go out), as a measure to distinguish themselves from others, so that they are not harassed.

Those who harass believing men and believing women unjustifiably shall bear the guilt of slander and a grievous sin. O Prophet! Enjoin your wives, your daughters, and the wives of true believers to draw their cloaks over them [when they go out]. That is more proper, so that they may be distinguished and not be harassed. God is ever forgiving and merciful. If the hypocrites and those who have the ailment [of jealousy] in their hearts and the scandal mongers of Madinah do not desist, We will rouse you against them, and their days in that city will be numbered. Cursed be they; wherever found, they would be seized and put to death.

— Qur'an , 33:58-61"

It specifically tells them to cover their hair and their bosoms and to wear cloaks, it permits the displaying of whatever is apparent of their beauty, save for the specific exceptions.

I find the face covering a bit 'holier than thou', as if the women are trying to be even holier and more virtuous than Allah intended them to be, which strikes me as a bit presumptious and even vainglorious. Of course, that's the women who profess to choose to cover their faces. Others are simply oppressed into doing so.