Indeed there are no more requirements. The MM will start your war as soon as there is another similar clan also searching. War is between 2 (reasonably) equal clans. It always was and always will be. Now, admittedly, the MM wasn't very good at enforcing this - but that's clearly been the design right from the start.
You haven't been excluded from war. You will war with clans equal to yours, just like everyone else.