When it comes to remixes and mash-ups, why should musicians have all the fun? That’s what the folks at Strange Tree Group thought, creating Shakespeare’s King Phycus, which nibbles at bits of Romeo & Juliet, Hamlet, MacBeth, and more, and tosses them in a blender along with a heavy dose of Elizabethan word-play and plenty of pop-culture references. Dueling Critics Jonathan Abarbanel and Kelly Kleiman weigh in.