The Detroit Pistons didn't think they would need to find a Malik Beasley replacement because they didn't think they would lose Malik Beasley. Maybe they won't — but for the time being, Duncan Robinson is acting as that replacement, meaning the Pistons (unintentionally) swapped one elite movement shooter for another.
Pistons fans will soon learn what Heat fans have known for years; that Robinson is one of the best shooters in basketball, both at a standstill and on the move (39.7% for his career) but he doesn't provide much in the way of offensive creation or defensive upside.