Some little suggestions:
1.) Taken from the Battle-net, they pretty much do what you want to do about showing what a badass your character is. They give you profile pictures every time you won 20/150/… times with a certain race. But they also have that for the amount of tournament wins you have. So I figured it would be really cool if you could give out medals or unique cloth or tatoos to players that win/take part in a big tournament so they can customize their characters with it (:
2.) Something I have seen quite a few times now (for example in Quake Live, Warcraft 3 or Starcraft 2) is an info box in spec mode. I would really like to see that for BRINK. Some small box that in some corner that can provide the spec (or the BRINKTV viewer :P) with information such as kills,deaths, k/d, accuracy, hitpoints healed, objectives done,… It should be fully customizable so that the spec can choose which information he would like to have 
Maybe also something at the bottom that shows how many hitpoints a player has, which weapon he has and which class/body type he is. Something like that is used in Counterstrike so you as a viewer can have a better overview. In first-person spec mode you can only see what one person is doing and eventhough free cam helps out quite a bit , I think my suggestions would help even more so you don’t lose track of what is going on on the whole battlefield and how the teams are playing tactical wise.
3.) If you aim for 50:50 chance to win for attackers/defenders on maps I would suggest you set different spawn times in Stopwatch mode because you would want attackers to have an advantage in Stopwatch because otherwise it will be a draw way to often and no one likes draws because Stopwatch is about which team is the better one 
But perhaps you already did that in your previous games and I didn’t realize because I never played Stopwatch 
