At the moment, selecting "Corrections Required" on the "Review Typesetting" screen simply closes the current typesetting assignment. Similarly, selecting "Request Corrections" on the "Typesetting Article #" page simply opens a new (blank) typesetting round.
Instead, I would personally prefer that selecting "Corrections Required" do the following:
(a) close the current typesetting assignment,
(b) start a new typesetting round, and
(c) create a new assignment that's automatically assigned to the same typesetter as the previous one.
(I was also entertaining the idea that "Corrections Required" could "re-open" the existing typesetting assignment, within the same round, so that feedback can be sent back to the typesetter for incorporation into a revised PDF/XML--basically the same workflow currently used in Copyediting. Though perhaps this is too dramatic of a change to the plugin's base functionality?)