Not even a surprise given how many good teams (especially in bigger nations) just miss out on a trophy in any given season. Putting all of those teams together in one big tournament was bound to result in some B3 worthy teams rising to the top.
Part of me wishes I could've participated in the inaugural BBM tier 1 myself, as I think I could've competed for the win despite teams Las Palmeras existing. But I wasn't thinking about that when last seasons ABBL finals happened (nor should I have since a national championship is too prestigious to intentionally forfeit over semantics).