My biggest problem with Super is that it takes place before the very end of DBZ, so the stakes don't seem to be very high. Unless they plan on retconning the ending.
Technically they've already contradicted the ending since Bulma says it's been 5 years since she's seen Goku and Super is currently 3 years before the ending. But death is so meaningless is Dragon Ball that the stakes never really feel that high anyway. (I like how the NEP after Hit kills Goku is basically just Gohan going "Uh oh, dad's dead again.")