Just my opinion but O'Mara's tactics so far speak to the weakness of Zimmerman's actual defense.
A lot of what he spends his time doing is trying everything he can think of to create grounds to have a guilty verdict overturned on appeal.
Hardly indicative of a "slam dunk" case for the defense.
For instance, he's not necessarily really wanting more time, he wants a record where the judge denies him more time.
He knows his request for sanctions against the prosecution is BS but its another possible grounds for appeal when the judge dismisses his request.