TPL/PTSC want this to be the last trial period. They are negotiating at mediation with the Js, but not all the cards are able to be played. They want all possible defenses layed on the table and closed within this last hand so there are no more battles go forward other than do you or don't you infiringe on our IP. My guess is the request for expeditied answer from judge Ward is TPL pushing Js to request it becuse they want final closure.
TPL/PTSC is not afraid of the prior art or obvioous issue because the Markman has solidified the 336 and 148. They are not concerned with the USPTO either due to the above and probably already know the majority of the USPTO review findings if not all.
Even though the Js may want to settle TPL/PTSC has to bring all avenues of defense to close in this case.
JMHO