The log report function could be made more useful by simply adding a few more actions to the $actions array in course/report/log/lib.php

// Prepare the list of action options.
$actions = array(
'view' => get_string('view'),
'add' => get_string('add'),
'update' => get_string('update'),
'attempt' => 'Quizzes',
'view discussion' => 'Forum',
'delete' => get_string('delete'),
'-view' => get_string('allchanges')
);

A further enhancement would be to add another selector for the module so that all actions pertaining to a single module could be viewed.