As much as I agree with this concept, how would you go about benching these? CS:GO has a lovely bench workshop mod, I know, and half of these games I have not delved into, but Dota for example has a DX and a Vulkan flavour, and no benchmark tool, and frequently is noticably more stressful during teamfights than just at beginning.
Edit: solution to Dota might be to benchmark a replay of a pro game with a specific caster directing camera. Pick a time range with interesting moments. Not sure if replays gain or lose performance over a live game, but it'd be more consistent.