By seeing an alternate translation of that verse, i.e. Rig Veda 10.18.8, it says the opposite of Sati.
Rise, woman, (and go) to the world of living beings: come, this man near whom you sleep is lifeless: you have enjoyed this state of being the wife of your husband, the suitor who took you by the band.
Also, there is commentary from Saynacharya ...
The answer is No. Vyasa says there are not inauspicious. In fact, a sensible man should worship her.
Kashi Khanda of Skanda Purana chapter 4 contains characteristics of a chaste woman. These are said by Brihaspati. These are again narrated by Vyasa.
After talking about duties and characteristics of a chaste woman, Vyasa continues to talk about duties of ...
Skanda Purana says so.
Skanda Purana, Vaishnava Khanda (Book II), Vasudeva Mahatmya (Section IX), Chapter 22:
Of all inauspicious things, a widow is the most inauspicious one. Her
sight or touch destroys the merit of men. (11)
If at time of starting on a journey one sees a widow in front, one
shouldn't go at that time. Otherwise death is certain....
A Partial answer.
Rig Veda 8.33.19 doesn't seem to be saying that women should wear a veil. This hymn 8.33 is about Asanga who became a female due to curse.
अधः पश्यस्व मोपरि सन्तरां पादकौ हर |
मा ते कषप्लकौ दर्शन सत्री हि बरह्मा बभूविथ ||
Cast your eyes downwards, and don't look up. Keep your feet closer;
let not anyone observe your back ...
Only a Pativrata alone can enter the pyre upon the death of her husband. That too, if she has young children, or she is pregnant, or she is menstruating, even a Pativrata too cannot undergo Sati.
I will provide verses from scriptures which discuss Sati practice:
Parasara Smriti 4.32
If a woman follows her departed lord, by burning
herself on the ...