I hope they don't tinker with the game modes too much, I love that there are different classes and abilities for attackers/defenders, which wouldn't work for something like TDM. I'm hoping they do something like "casual", "ranked", and "party" (mandatory mic users). For a new mode, keep diffuse, secure and hostage and add "destroy" where the attackers must destroy both objectives (unlike diffuse where you only need to select one), or something like "Kill the VIP" where the defenders can move the VIP around the map (who has way more health than the hostage).
As for operators, I gotta disagree with some of the ideas posted here (like invisibility, etc). Keep them tactical and balanced. Some ideas I had in mind:
Defenders:
-An Op (or if they changed Pulse's heartbeat monitor) that can place 3 motion sensor alarms around the map.
-An Op that can knock murder holes easily (like sledge, but smaller holes).
-A shield Op that shoots a taser to stun an opponent (like how Blitz's shield can blind you)
Attackers:
-A medic
-An Op who can hack the stationary cameras so the attackers can use them (it wouldn't be quick, you'd have to hold a button like planting the diffuser, and the camera then flashes blue when in use [as opposed to red] so the Defenders know). Maybe limit it to 3 cameras so it's not overkill
-I'd love an Op with a cornershot pistol, but don't know how they'd make it fair. Looks like this for those who don't know:
