I'm with you, its more the fan speed increases that isn't great, if hot-spot/junction temps go to much more 100c I'll go back to the 2.4.1 drivers until the hot-spot temp is sorted out if it gets sorted that is.
I'm hoping the Lian-li Lancool 2 mesh mite help temps with 2x120mm on the psu shroud pointing at the gpu, from reviews it did bring temps down 3-4c what that will do to hot-spot I don't know but and that was with 1x120mm fan so I'm hoping it will keep it below 100c.
I wonder if a 120mm across the back of the GPU might be more effective? adding a 120mm fan under the card would help the cooler get more air but the back of the GPU has no airflow, other than that from your case intake fans and they don't reach that far.
This backplate is metal, it gets very hot and the back of the GPU socket area is open, to have some air blow across that might be quite effective.