Yes, but there's slave revolts and there's the Haitian revolution.
The former happened like everywhere, the latter has only happened once in the history of the world. The biggest change of no French Haiti, is absolutely going to be that one of the most significant events in world history won't happen in the same way as it did in OTL and with the same factors involved. The way in which the French ran their colonies and what was happening to the French back home is the reason why the revolution happened the way it did, it wouldn't have happened without their being so many slaves compared to white settlers, so many free blacks and so much internal feuding.
And well if you're talking about 'why did the Atlantic slave trade die out in the 19th century' that conversation starts and ends with Haiti.
I respect
@SenatorChickpea a lot and I see why he thinks the original post was under sourced (and I certainly raised my eyebrows at the idea Haitian slavery was unusually brutal rather than merely unusually extensive). But I think the sequence of events that
@Ricardolindo sketched out in the OP is plausible.
That is:
No devastations of Osorio
No French colony in Hispaniola
Spanish Hispaniola has a more mixed economy with brutal slave plantations intermixed with cattle ranches and so less slaves per white settler.
This means any slave revolution is less likely to be successful, given that no others in the new world were.
Without a successful slave revolution terrifying every slave owner in the New World, the slave trade continues for longer.
Hispaniola emerges as a united country among the lines of Cuba, Brazil or Puerto Rico rather than along the lines of Haiti.
Because of this it's almost certainly likely to be richer because the rest of the world has less motives to fuck it over than they do a black slave's republic.
Like do I think that's the only way that POD would turn out? No, there's lot of ways it could. Do I buy the logic as a possible result of it? Yes, I do,