You know, I love that gamemode as well, but I think it's suited better for tactical shooters such as America's Army or (lol) even Counterstrike*

The battlefield series has always worked well with waves of reenforcements making the battle seem much larger than it really is.

That said, I wouldn't mind maybe a special one-off level with this type of gameplay.  Something involving a lot of stealthy ground action.  Some kind of sekret Imperial research facility and a Rebel strike team.

*not a tactical shooter

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That mode of play is best for other games as was mentioned above.  I don't think it would go over well with the BF crowd.

One BF mod that would fit with that style of game play would be Project Reality.

IMHO

I think that would be a nice addition.
Liked that Search and Destroy mode in Call of Duty, although I have always been one of the first ones to die.
Knowing that you only live once adds some special sort of tension.
With the ability to revive people as a medic, it wouldn´t need to be too annoying to always get sniped within the first minute, since there is a way back into life and it would really be down to teamplay to wipe out the enemy.