the reason why strategy games have overhead cams and why league and dota have overhead cams is exactly the same
both strategy games and mobas require you to have perfect awareness of your surroundings and the ability to quickly swap the camera between different positions on the map for the sake of being able to see what's actually going on
i don't mean this as a slight but the only reason why you don't see the benefits of a top down view in a moba in the same way that you can see the benefits when it comes to strategy games is because of unfamiliarity with the genre
it's not superfluous or a relic from warcraft 3, the camera point of view is an active conscious design decision and its absence is one of the main reasons why deadlock feels so fucking awful to me as it doesn't go nearly hard enough into the direction of the action game part of the mashup to actually justify the perspective shift in any way and it just results in everything feeling like a disorientating blur