It is unfortunate that the tools aren't there to allow clans to arrange proper scrims right now, I totally agree. But you also have to think of the people that queue to find a match only to see a team drop out immediately before the match even starts.
Eventually, we will be able to share server files with the community so they can host their own private servers. We will also be making more updates to multiplayer throughout the early access period, including ranked matchmaking, which should help in the long term. In the short term we are trying to fix the issue with passworded servers so we can at least start making a server available for clans to spend some time on.