Couple of things I'd like to address:
1) About the "Tell Me about yourself" - You have to understand that once you are in a B-School Landscape, you will have not more than 2 minutes to meet someone new and pitch them about yourself in a networking event. This is a very good practice pad. You have to choose what to share and what not to. What makes you uniquely you? How you frame your answer to that question is very important as you travel through your MBA journey!
2) About the "Do you have any questions for me" - simple way to decide what should be asked is if you can find it online/blog then that question is a big no. Look at it this way - you are mostly moving into a new city, new culture away from home. Do you really not have any questions about how the city is? Do you not want to know what made the interviewer join/excited about McCombs? This is a great chance to stand out from your peers and show that you really picture yourself living there. And again this is a skill that you will need to use as you recruit here.
3) The wait for the decisions is exhausting - but you should hear back soon. Keep a positive mindset! I applied for 3 years in a row, so I totally understand what you guys are going through. It is worth the wait.
4) The Soft-skills assessments will NOT have an impact on your decision. Its clearly mentioned in the mail - so don't worry about it. I cannot stress enough that this is not going to affect your admission decisions. All the Top B-Schools are piloting similar tools. Hold your horses before you make any deductions whatsoever.
Take a breath, relax! You've done great to get till here, just a few more hours of patience!