I'm not arguing for universalism here, but when reading through Romans 9 I don't see any mention of eternal bliss or torment after death for the vessels of mercy and wrath, respectively. Unless, you can point it out with specific verses, I don't see any mention of afterlife in Romans 9 at all. Based on the text, it appears to be about God's sovereign election for earth bound purposes. Isaac was the chosen seed, not Ishmael. Jacob was chosen over Esau. God rose up pharaoh and then hardened his heart. If the context of all these examples that paul gives are earthbound, I would argue that so are the vessels of mercy and wrath. The jews (those who rejected Christ)/ vessels of wrath were about to be cut off (70 AD) and church (believing jews and gentiles) /vessels of mercy was about to be grafted in. Christ predicts this and paul talks about this in Romans 11.
A nice thought perhaps. Indeed true that Romans does not tell us what destruction means.
The problem I have with such discussions is that it undermines the context in which the verse is given, especially from a view that insists God has to totally forgive/overlook/not see all sin. I do not see that supported when the writers pens something like before the verse already given:
"I will shew mercy to whom I will shew mercy, and I will feel compassion for whom I will feel compassion."
And the following that with the idea that some will have mercy and others destruction, makes no sense to me as simply a temporal demonstration of God's Power, it is either true He is Just, Love, Mercy, and Power or not. I do not see one trait as having to bow to another to suit my idea of a human father's love for his child.
And the same passage goes on before making the statement in question. Stating that we are talking about a pot whose heart is hardened to the Pot Maker and never changes. Rather anticipating in my view of a question what about Love and Mercy, a question is then asked is really valid for the pot to ask "why have thou (God - Pot Maker) made me this way" and the answer is given the pot has no right as the Maker can make one for honor just as He can make one for dishonor. If none are made for real dishonor in any temporal sense, then I fail to see what the point is pretending there is any dishonor that could be of any consequence. Because the writer would have to be understood as God making someone's heart hard, only temporarily to demonstrate a point. UR also dissolves any sense of talking about predestination as every one has the exact same destination. Yet most of us believe in some form of predestination.
And the answer to whether the pot made for destruction asking of God why make me with a hardened heart, this is given:
Or has not the potter authority over the clay, out of the same lump to make one vessel to honour, and another to dishonour?"
Furthermore I only copied the first part of the sentence and not the closing part:
vessels of mercy, which he had before prepared for glory, us, whom he has also called, not only from amongst the Jews, but also from amongst the nations?
Which if am to accept UR, God calls everyone AND eventually gives everyone the gift of faith to just be able to respond to that call. So the idea of being "before prepared for glory" as being understood before the Potter even molded the creature is instantly dissolved into thin air if I am suppose to understand the Potter before He made anybody decided not only is everyone made for glory, but everyone will make it to have glory. So what if if a pot doesn't get it as soon as another pot.
Cannot see in this UR view any lasting distinction, much less real dishonor, between two groups of pots if there is no real distinction to be known by God alone before He made us and also no lasting dishonor for anybody.
Leaving this with the closing thoughts of Romans 9 which also make no sense if there is no real and eternal sense of destruction. No sting of death for that matter or need to win a victory over that if no one is eternally separated from God.
"And according as Esaias said before, Unless the Lord of hosts had left us a seed, we had been as Sodom, and made like even as Gomorrha."
And the writer goes in the next part of the letter to confirm we are talking about salvation here. Which makes no sense to speak of in just a temporal sense, especially when he asks and shows people who will be saved (have been shown Mercy) and those who will not be saved (shown God's Wrath).