Explosive Drill gun for engineer:

Can damage people through walls and will explode destroying the wall, can damage people in vehicles and will damage and explode the vehicle.

Thermite grenade:

Similar style to Apex Legends, throwing the grenade after pulling the sides away from the centre will prime it, and on contact with anything will create a wall of fire (excluding water, it can probably fissile and die)

Flares:

Assault or medics, when tossing a primed flare, it will start a 1 minute timer and anyone that spawns on the flare will be sent to a plane (for O.R.E) that is in transit to the battlefield, after that minute, every player in the plane will jump out and can glide in. Same thing for the other faction but a helicopter drops people via zipline or can glide out, maybe chosen by vote.