before the overall projectile increase, most head hitboxes extended about half their size above the actual model of the heroes.
i feel like genuinely, increasing projectiles is a good idea and i dont even really think they have to tone it down, but the head hitboxes are now way too big. they technically have always been too big though. so now would be a good time to revisit those.
obviously, that would be much more work than just adjusting projectile sizes. but i feel for non headshots, they are fine.