Being able to spawn cover, like sandbags. The engineer for example could be able to choose between rpg, anti air and sandbags, while keeping repair tool. he then could have something like a shovel to fill the sandbags, kinda like the medical role has to charge up before reviving a mate. or he has a lot of single sandbags that can be placed and that s*** onto each other to be able to build a taller cover(but can be placed freely on the ground). There just was way too little cover in the alpha and I think that being able to strategically place cover could be a really good feature. The cover could then be destroyed using like 2 rpg rockets. The sandbags could also not be refilled so that they cant be healed over and over again.