Wrong on all accounts. Sorry but Team deathmatch has not a viable multiplayer mode since the late 90's.
That's because at some point in between, shooters stopped including high powered pick-ups to promote map movement, and slowed down movement significantly. If you tried to camp in Quake TDM you'd be repeatedly torn apart by a Quad/Mega stacked team whizzing past your location spamming you with explosives, then bouncing away before you could shoot back.
In modern "realistic"/console style shooters, there's no incentive to move around the map to pick up supplies, and movement is so slow a geriatric grandmother could fire at you before you can move back into cover.
So you're right, it wouldn't work in cRPG without adding some incentive to moving around.