Tensions only killed if you think Saturn and the gorosei are top tiers.
If those 5 aren't top tier why they are the highest authority?
-But Spandam...
-Why they rule the world?
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But they aren't fighters...
-THEY ARE!!! Why save them for the last saga if they aren't top tiers??
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They aren't that strong
-My boy just show up and all the top tiers at Edgghead notice him, a guy's head exploded, put Sanji and the rest down with just a glaze, and so far no one has landed an hit on him (so far).