i think i agree with this which means i only dislike roguelite as a top level category (but see below). in your mario tennis example it might go something like

sports ¬ tennis ¬ arcade (as opposed to simulation)

a mario tennis where it would be practically impossible to win a randomly generated tournament without grinding out some progression would be

sports ¬ tennis ¬ roguelite

so it seems to me like roguelite is less useful as a genre rather than just being descriptive of a feature i suppose