It seems like you may get an extra ball at the end based on performance, there are times when members of the same team seem to receive different amounts of Premiere Balls. It'd be cool if by doing more attacking (rather than dodging half the time lol), or having a good attack/dodge rate you can get a better catch at the end, or better rewards. Just as it'd be nice if a better throw would directly influence catch rate; some sources say yes, other times it seems like it doesn't matter.
And yeah with the 20k distance it kinda reinforces how Rare Candy is basically for Legendaries
I guess I can make myself feel not so bad knowing Legendary IV can dip as low as 60s, or low 70s, from what I've seen