A few notes on those points:
1) The fields are probably mandatory because so many times routine entries were not filled correctly, and even MORE overhead was required going back and forth between teams to find out all of the details. If there is a way to avoid this overhead, again, how do you stop people abusing it?
2 & 3) Yeah.. bad overhead.
4) A sanity check is ALWAYS a good idea, whether its a fresh intern or the most seasoned programming in the company making a change.
5) They security processes might seem excessive but once again are probably in place due to issues in the past that have required the review/signoff be there to stop major disruptions getting through.
6) As someone who worked in QA for a while, there is no way in a hell someone can say "push this change through" without a strong questioning of why. QA is there (in most cases) to be that last line of defence. Often letting people know just how many people are really going to be affected by this change.
Being on a testing team often gives you a broader oversight of how all of the components of the code work together, while people working on one project can sometimes get tunnel vision on getting their thing out the door.
Edit: Just like to point out, I'm agreeing with you