Do Ahlus-Sunnah wal-Jama'ah believe in the eternal damnation in Hellfire of those who consume usury after admonition, the "clothed-naked" women, and those who abandon prayer?

The one who consumes usury, the woman who displays her adornments (mutabarrijah), and the one who abandons prayer without denying its obligation, these are among the perpetrators of major sins who will not abide eternally in Hellfire if they die upon monotheism and have not repented. They may be punished in proportion to their sins if Allah does not forgive them. This is the doctrine of the People of the Sunnah.

As for the verse: "So whoever receives an admonition from his Lord and desists, he may have what has already passed, and his affair is left to Allah. But whoever returns [to dealing in usury] - those are the companions of the Fire; they will abide eternally therein." (Al-Baqarah:275), it refers to one who deems usury lawful, and such a person is a disbeliever who will abide eternally in Hellfire. However, the Muslim who acknowledges the prohibition of usury but commits it due to weakness is a sinner whose affair is left to Allah if he dies without repentance. The eternal abiding of sinners in Hellfire is metaphorical, not perpetual.