It seems to me like there is a real interest to play more matches competitively. I would highly suggest someone organize some Battlefy tournaments. They are more formal and provide pre-formatted tournament structures like team registrations, brackets, rosters, rules and the ability for prizes and entry fees. In my experience, the more formal the competitive space the more popular the game becomes.
Get away from coordinating this stuff via forums or discords and get it on a software platform where it is easier to manage and has much more exposure. I think you will get much more participation this way. Just a suggestion...