If "Haikyuu!!" were to focus on beach volleyball instead of indoor volleyball, the series would likely showcase a different set of skills and strategies unique to the beach volleyball game. The dynamics of the matches would change due to the differences in the playing surface, team sizes, and gameplay style between beach and indoor volleyball. Additionally, characters might have to adapt to the challenges of playing outdoors, dealing with elements like wind and sand. Overall, the series would explore a new and exciting dimension of volleyball, highlighting the intricacies of beach volleyball tactics and teamwork.