In my experiences with various online shooters, it would seem that the slower reacting, less perceptive players tend to try and hide and (when the game has it) use disquises to try and scraqe by. Players like that usually look for the easiest ways to play instead of taking on challenges that could benefit everyone.
The Operative might be a little over-used at first, but once players start coming out of their shells and figuring out what works, I think we will start to see a good mix of classes. I'm assuming that for the first month of Brink the classes will rank in popularity like this:
1.Soldier
2.Operative
3.Medic
4.Engineer
In my experience playing TF2 in pro-leagues, that really isn't the case. At all.
I can definitely see where you are coming from, but remember. A statement like that is subjective and generalized.
My clan had two of the best spies, one of them being Kai. He would use the disguise to not only try and run around the enemy,
but he also used it to get insane back-stabs.
As for the way my experience worked out with Global Agenda, the classes were up and down, but yes pretty much the same.
The Op argument definitely takes place here.
1. Recon (operative)
2. Assault (heavy soldier)
3. Medic
4. Engineer
The game was balanced in same areas, and very unbalanced in others.
Most players had adopted Recon for the fact that you could run a gillion miles an hour,
whilst firing your weapons at high rates of fire jumping all over the place like a Light on crack+speed.
In Brink however, you can have a Heavy operative. So I guess we shall see how it plays out.