I think you misunderstand me. I don't advocate forming an 'entanglement' but for the US/France to lead via the UN probably some positive change in Haiti. All the other things that need to be fixed can't be done unless there's a government to work with and the current one is seen as illegitimate since the PM is viewed as possibly benefiting from the assassination.
The US/UN pressuring the PM to hold new elections with outside observers and perhaps not-US UN troops to maintain security at polling sites would be a good first step.
Imposing a caretaker government of Haitian diaspora would be a disaster but allowing the current situation to fester will like in Lebanon only lead to further and further problems.

It's funny that if Haiti hadn't scared all the whites with its original rebellion, instead receiving freedom by some French or British dispensation, we wouldn't have screwed it over nearly as much.
Well of course it wouldn't be screwed over as much as it would still have had trade and cultural ties to a market place for its products. Since the collapse of cane sugar prices due to cheaper sugar beets and high fructose corn syrup all former 'cane sugar islands' have had to diversify into other industries: mostly tourism, some military etc... Hawaii was able to shift to tourism and military industry. Puerto Rico sorta did the same but has never really recovered from the collapse of cane sugar. Haiti not having outside federal, commonwealth, or French association to keep it going has been a big problem for it.
Yes, it was deliberately screwed over several times but it has certainly shot itself several times over too.

As for the reparations, that's not surprising as of course the French would look out for the interests of its former plantation owners. When the British ended slavery they paid compensation to slave owners too. The US South lost a civil war so yeah that was not something the North was going to do during the period of Reconstruction.