As a Clan we’ve been talking about this. Not only do we need to learn how to move as a unit and maintain a squad marching order, but we need better discipline at close quarters. This is about how to properly stack on a door, pie it, clear a room, or even when you should (and shouldn’t) “frag out” to dominate a room.
Hulu has a whole series dedicated to this. I would suggest you take in the first few episodes (in one eye), while reading the new “guide” from Dyslexi (in your other eye). We’ll also be loading up the CQB Training Facility and giving it a go before building our own DotS version of it, soon.