re: Superstars who could use a new theme?
Roman Reigns, firstly. He should have his own theme, not the Shield one. He needs a change in gear too. He should get rid of the vest.
I don't think Dean Ambrose desperately needs a change. His theme kind of suits him, in my opinion.
I think Rusev could do with a change. His character has evolved and he could do with a more suitable theme.
Dolph Ziggler needs to get rid of that record scratch in the beginning of his entrance. It's pointless when his theme starts playing a few seconds later anyway.