Getting up to speed: Sonata Pathetique

Hi all, I’ve been learning the first movement (and relearning the second) of Beethoven’s Sonata Pathetique for Piano for a few months now. I’ve hit a bit of a wall in terms of tempo in the Allegro Molto con Brio sections - I can play them fast and accurately and articulately, but no way near fast enough. I don’t think reverting to hands separate practice would help because I need to coordinate the right hand with the LH tremolos but it’s just not seeming to get any quicker.

Pianists, or any general musicians, what would be your top advice to getting pieces up to speed?

(Pages 2-4)[http://imslp.info/files/imglnks/usimg/f/fb/IMSLP30364-PMLP01410-Beethoven_Sonaten_Piano_Band1_Peters_Op13.pdf]