I was watching my favorite show the other day, Scrubs.
Heard season 9 was a major departure
It was techinally a spin-off, Scrubs: Med School. But the network insisted on just calling it Scrubs.
Was it good? I've never watch it
The spin-off was not good until the last half of the season. It got canceled right when it was starting to hit its stride.
Heard rumors that they are reuniting the cast for a season 10
I haven't heard about that, but I think everyone has moved on. If there is a reunion it will probably be a one-off.
Yeah, i was reading the reviews for season 9. Quite awful.
I think a lot of the writers changed, so it just didn't click the same way. 
That always happens to the best shows