I agree that it would have made a lot of sense to have Kasual / Kompetitive modes further divided into Kustoms and Tournament variations. Because i'm going to my first tourney in August, i'm strictly only using tourney variations until afterwards. Short term, this means i'm not enjoying the game to its fullest extent as one of its primary features is impractical for me to use.
However, in the long term this does make the game promising for me. Allows me to continue exploring parts of the game further into its life. It would be nice, when the time comes, to have some sort of ranking for custom variations. A Kustom Kombat league?
Maybe they have these things planned way down the road. Like after 2 years, the usual death knell for an NrS game, they release a new patch that balances ALL available abilities and announce the Kustom Pro Kompetition. If they were to fund that the same way they've funded these early tournaments, hype would surely be raised and many people would want to partake.