This is functioning as designed and there is not a change planned for this behavior. The reason for this is that when a test/survey is randomized, there is no way for the Table of Contents to know which/how many pages will get randomly selected, or in which order.
As for Status Tracking, note that even when a test is NOT randomized, while the individual pages will get set to Completed, the overall test will NOT automatically change to Completed if it is a graded test. A graded test must be passed to change to Completed. (For more information about how Status Tracking works, checkout my Inspiration Wednesday recording: http://community.trivantis.com/knowledge-base/status-tracking-with-lectora-v11-3/).
Hope this helps.
Daryl
Lectora/Lectora Online Product Manager