Let me just say first off that i agree with you about the microstates issue, and i do think that you are right about it being beneficial when countries to unite together to better resist imperialism and colonialism. That being said, the idea of present day Romania absorbing Moldova is deeply appaling to me, it would be a catastrophe for the people of Moldova as they would immediately become NATO's new front line in the war against Russia. So long as Romania is a loyal vassal of Brussels and Washington and so long as its ruling class is top to bottom Atlanticist, russophobic compradors who do nothing but worship American and German boots any sort of unification is unacceptable and should be prevented at all costs.

If any kind of reunification is to take place there it should be with Russia so that Moldova can join the Eurasian sphere which is where the future is and where the most economic development will be happening going forward. That way Russia can help them like they are helping the liberated Donbass now to start to recover from the economic devastation of the last 30+ years since the destruction of socialism. Because its only future with the "West" and "Europe" is as yet another neocolony to be exploited and drained of everything of value by the big western European powers while being turned into a militarized NATO outpost like so many other eastern European states that were absorbed into the neoliberal EU abomination.

Romania and Poland are well on their way to becoming second and third Ukraines after the West has used up all the Ukrainians, why on earth would any sane Moldovan want to enter into this suicide pact? I think the whole discussion about whether or not Romanians and Moldovans are "one people" is irrelevant. That may even be the case, i grew up hearing that my whole childhood so the thought is hard to shake, but i really have no interest in having a whole ethno-linguistic debate about national identity, because regardless it does NOT justify unification under a Western puppet state that is currently locked without any foreseeable hope of escape in the neoliberal, totalitarian prison of the EU and being increasingly occupied and militarized by NATO.

Why would you want to doom the poor Moldovans to that fate? At least now they still have a hope of kicking out their US installed comprador government, even if they'd need a little help from Russia to do it. If they are our brothers then let's be happy for them that they have not yet been swallowed up by the Leviathan like we have.

P.S. I think the point where you are most absurdly wrong on is the idea that Romania could just decide to turn away from the West once it has gotten what it wants from them. That's not how neocolonialism and imperial vassalage works. Point me to one instance where that has worked, where a country could just freely decide to exit US vassalage after its entire institutions and elite were captured and remade in the West's image. You think you're being clever bending the knee to the empire because you can opportunistically benefit from it but in the end it is always the empire that wins and you lose, and once they have you they won't ever willingly let go. For Romania to escape the EU and NATO at this point would take an all out war of decolonization.