Fighting two revolts in different regions of the empire wouldn't impact Ottoman performance at all?
Not really. They had to deal with Janissary Revolts in 1807-1808 while also fighting the Russians while also fighting the Serb Rebels. They dealt with two of the three problems (guess which one they could not deal with lol). A Greek Rebellion near the Capital is not a threat if it does not last.
It has effects on Ottoman Performance but they can crush it and move further to Morea. Or... they just ask Mehmed Ali to deal with Morea like OTL but earlier.