I think a faster pace is good, but not too fast. I'd like to see some fillers, and most of the Sinnoh Fillers actually seemed interesting, IMO (might be different for you, but I don't care). Still, we don't need to wait four years for one region to be done/only one badge in a year because then it will be rushed at the end, and that's what happened to Sinnoh.
I'd somewhere around 130 - 150 episodes seems pretty good for Best Wishes, or at least somewhere around there, but 191 episodes is way too much.