Honestly, would Ukraine just be better off giving up their claims to the Donbass & Crimea; I realize it would set a terrible precedent to allow Russian aggression to succeed,
That should pretty much end the debate right there, given you know, the History behind it all.
but I just don't see any realistic way for Ukraine to successfully reintegrate these territories,
I do : regime change in Russia. Its not realistic in the very short term, but it is possible. Another realistic scenario : Russia's current elite realises it is going to be much more humiliated partnering with China that it would be with the West. In exchange for respecting democratic norms, it is guarenteed a certain stability.
certainly not at an acceptable cost. And from what I gather, the people in these regions largely want to align with Russia, any way.
Crimea, possibly. But then, the people in Crimea are colonists. That doesn't mean they are not entitled to self-determination. But so are Crimean Tatars. Should Crimean Tatars be subject to collective rights abuse because russophones were (allegedly) suffering collective rights abuse under a Ukrainian regime.
Donbass - very debatable. Pro-Russia doesn't mean wanting to be annexed to Russia. But Putin's conception of Russia is now clearly imperalist.
Perhaps the best solution is some sort of legally recognizable referendum monitored by the international community being held here.
If it were the best solution, why did Putin fast track the Crimean referendum. Why didn't let a campaign form up?
The best solution right now is to end NS pipeline, end our reliance on Russian gas, and cut the oligarchs legs off that control the Russian elite. The last obstacle would be the military-industrial complex there, but if they want to lose their marbles and carry on a hot war, it will be a much bigger humiliation that the end of the Cold War.