R1 can be like that in breach mode but I found it to be awesome having a 40 man team at the door of the enemy base
Ha ha hell yes. I remember the fun. You still have Auger to spam the people outside though. The base weapon spawn points ensure you have regular supply of ammo too (as long as you can hold them).
And you can focus on getting kills using grenades when you're locked in. Ah, the memories...