I really like your summation; you made a great point! 
A picture of the structure as it looks today would be a good addition and if there is an artists rendering of how it looked originally, that would be great!
A couple of questions:
Who was the Etruscan King that was overthrown by the Latins and who was leading the Latin charge? Is there any information on them? 
Why would chariot racing give the lesser magistrates more notoriety? Did they actually race the chariots themselves?