So like Rainbow six or CSGO where one team has to defend from the breachers who are trying to either plant or defuse a bomb in a small area like a house (like R6) or a really small map (like CSGO)
This might be a problem for Engineers and Recons and it is
Overral I think it would be pretty interesting although my initial concept might need tweaking to fit the game but I think it could be pulled off