To paraphrase a poet of no small worth:

If I had but words enough and time, your excellence, Prince Edward, would be more eloquently described!

You simply cannot read Act V and not think "Hamlet, this is how it is done! Act after act of moaning and manipulation? Heavens no! Edward III solved a problem of similar size without a single scene change!" Or compare this to Hieronimo's revenge in The Spanish Tragedy; despite being offended in similar fashion, it takes Hieronimo act after act of bemoaning his fate for him to finally "man up" and go for the throat. Let these lines stand testament to the awesomeness that was Edward III

Edward III Ah, Mortimer, thou knowest that he is slain,

And so shalt thou be too. [To Attendants] Why stays he here?

Bring him unto a hurdle. Drag him forth;

Hang him, I say, and set his quarters up.
But bring his head back presently to me.

-Edward II 5.7 50-54

Edward is genre savvy. He doesn't dilly dally about with prisons and such; he finds the evidence he needs and then he executes the criminal. Bravo, Edward, bravo -- had your father but the tiniest measure of your sense, he would have never fallen to a scumball like Mortimer.