The complete Moodle SCORM player reloads each time when using it's content-tree-menu to navigate to another content page from a SCORM package. Loading the player takes mostly much longer than the actual content page. Like this, navigation through the content of SCORM packages is slow and feels unpleasant.
Possible solution: When the client uses the content-tree-menu to navigate to another SCORM content page, just load the content page in the existing iFrame without reloading the complete SCORM player. VDAB ( http://vdab.be ) is working on this solution.