These are the shots I mentioned before! On one hand we have Haru - who rediscovered the meaning of swimming with his precious friends last season and is now struggling to discover a goal. And on the other we have Sousuke, who has always had a goal but is only now discovering the meaning of swimming with his precious friends.
I find the fact that they juxtaposed these shots so interesting, because here Sousuke is basically saying goodbye to the world stage; he is getting closure on his goal, but has found meaning in the sight he saw.
And meanwhile, we have Haru - who is looking at the stage anew.
So I feel that it symbolized that the chapter that just closed for Sousuke is opening for Haru (even if he is still uncertain at this stage).