In full automode the latest 8spds are great, pretty much seamless upshifts at any driver demand, and perfectly revmatched downsifts. They are can cope with a very aggressive torque converter locking strategy, so most of the time they drive like a manual (doens't feel like much if any "slip" is occuring, so none of the horrible elastic feeling between engine rpm and roadspeed).
Typically for stop start driving they also start in 2nd or even 3rd gear from rest, limiting the need for some changes.
The only time i notice the number of gears is when in manual paddle shift mode, when it feels like you're playing a pinball machine when manually downshifting during a hard braking event (although with some transcals, just holding the "down" paddle will automatically drop as many gears at once as it can, without needing to be pulled lots of times.
if you've ever driven a current 6spd ZF auto and been impressed, the 8spder is about 200% better in every respect