I also dislike those
previews, I mean at times it seems like they spend more time telling whats coming up than actually showing new things. Same thing happens on DWTS and I always FF there also.
They did show a few clunkers but I liked how they kept it to a minimum, not like another audition show(that I rarely watch) that seems to linger on the bad....
I also agree with your third point but again the FF button limits the false expectations(except when I forget to push the button fast enough

).
ATL sure lived up to it's name, HOTlanta! Many great dancers thats for sure.
Nice to see Mary back but IMO Tyce blows, he seems so egotistical, Lil C' is a bit odd but OK, sure miss Dan Karaty he seemed like a decent guy.