That was my beef about her Samba! It should have been all 9s, because while what she did was good, there were no rolls. I just don't believe in awarding 10s for dances danced perfectly that have basic steps.
That said, that 8 from Len for James's Jazz was criminal. At least give the guy a 9. I'd say that if you are going to dance a lot of a routine unpaired, a routine with Jazz is the best one for that.
I actually liked Hannah's tango and Kel's Viennese waltz the best.