Rhyming is part of the problem. Playwrights' work has to be remembered by the actors by heart.
Also, the ones you mentioned lived in the 16th century, when languages were not very sophisticated.
Also, the ones you mentioned lived in the 16th century, when languages were not very sophisticated.
The vocabularies might be bigger or smaller compared to today. Certainly no one was saying "bae" back then (for instance), but no one calls each other "thou" today, either.
EDIT: except for the older generations of Geordies, apparently.