Interesting. Warmer ocean causes MORE WATER VAPOR. Water vapor forms clouds, that reflect sunlight back into space until they dissipate as rain or snow. And this NEGATIVE feedback is omitted from the climate models, except as an average over the entire globe rather than specifically as clouds form and disappear.
It's not that simple, and cloud effects on radiative feedback are still uncertain. The type of cloud and its altitude are significant factors in ultimately determining if the effects of the clouds will be more importantly reflective or absorptive.