>>47941121You're thinking with the single focus on team building and viability.
This is like doing a detailed PvP analysis of Mightyena, something that serves a role in a single player campaign as a fodder Pokémon for enemy grunts.
It's also like looking at Hisuian Growlithe and fretting the Fire/Rock typing, without considering the stone lion dog design befitting of a historic Asian region.
Point is a lot of Pokémon are designed around a concept, not efficacy or utility in a single aspect of a game like its battle system.
That said you could still play up the evolutionary arms race aspect of Heatmor vs Durant, by adapting both of them yet again and playing on unique beneficial typing.
Though, admittedly that's a bit difficult, there are few type combinations that provide so few weaknesses like Bug/Steel, and most of them happen to involve Steel typing negating another weakness.