Lame "Stealth" Mechanic: Let me start off by saying, I LOVE stealth games. Any FPS that state's some kind of attempt at Stealth, even if not formally stated as such, is on my list for a try at least. Unfortunately, I've found most games that do not focus on the stealth 100% tend to fail all together. Also, stealth never seems to work well with multiplay unless, once again, its focused on 100%. TF2 was close and AVP was closer with their invisible aspects, however, general lag over the internet could lead to unexplained 'spottings'. If Brink can come through on their Operatives class and its ability to "hide in the shadows", I will be awestruck. If the Operative's "stealth" angle is restricted to exclusive access to certain areas, thats ok. I just hope I won't be running around for no good reason, going to places anyone can go, and losing any additional tactical advantage other then the speed. Maybe future gameplay trailers on the Operative in particular can help me understand exactly how they will work.
Yeah I wish operative had some tactical adv aside from abilities. There is definitely no speed boost or area unlock that isn't controlled by body type, so if you go stealth, try med/light before heavy.
On to the part I am worried about...
I hope the game has friendly fire (default on for consoles), because otherwise players will just spy-check, regardless of experience deductions per bullet etc. Serious gamers in particular will abuse the fact that you cannot teamkill because if the game goes MLG, experience doesn't matter, winning does.
Also, I hope changing into a disguise takes a while (five seconds or more, that way it incentivises smart playing, not just boosting for the 200xp, which would cause ppl to stack operative just for the fast xp, screwing the team as a whole). Next, I hope the operative's ability to spot other disguised operatives takes a lot of distribution points, because otherwise everyone is going to use it for the free kills, defense, etc. You really cannot have one of the previous suggestions without the other though, otherwise it makes the operative's ability to disguise either underpowered or overpowered.
I would prefer a hardcoe approach to stealth, ie you look like an enemy to teammates (thus teammates attack you), but your enemies--most likely--won't (FF is on) without provocation or odd behavior (even different footstep volumes per body type, ie heavy=thunk while walking, light=almost no sound, even when running, so if you pick the wrong body type--statistically a 2/3 chance--you can be found out by a player that pays attention to detail), that way you have to avoid being obvious while avoiding being killed by your teammates on the frontlines. It would make MLG impressive to say the least, seeing as spy is interesting in competitive TF2 already. Since interrogation's radar reveals spies, I don't think FF and
no operative ability for finding enemy operatives would end up making spies that OP (granted you might need to add footstep distinction as well, just to give the cautious player the adv 2/3 of the time). You never know, maybe the spy will forget which team he is on and start shooting his teammates. XD
Really, when it comes down to it, you have to "focus on the stealth 100%" Any way SD does it, I'll probably be happy since I won't play operative that often: operative will be overplayed, seeing as so many people consider themselves ninjas/spies/assassins/whatever-they-want-to-call-it.