Everyone, we can fix Hamlet and Romeo & Juliet if we just switch the leads.

Romeo wakes up in Hamlet's body and meets the ghost of "his" father telling him to kill his uncle. So if course Romeo just fucking does it, because he never considers consequences, and then gets onto more important shit, like romancing Ophelia, political fallout be damned! But given that he's the son of the murdered king, he'd probably end up on top.

Hamlet wakes up as Romeo and is told that he can't marry the love of his life because his family hates her family. Instead of killing Tybalt and getting Merucio murdered, he's planning elaborate meet-cutes for the two warring families. He's putting on plays about blood feuds and how to overcome them. He either succeeds in bringing the families together or bores Juliet enough with his indecision that the glow wears off and she moves on; both positive options. Everybody lives.