One thing I always wanted to see that would be more balanced, and IMHO more fun, would be more “thing” camps in the game. Stuff like the vision or turret camps on Hanamura or the healing camp on Volskaya. Or even camp things like the snowballs that temporarily disabled towers on that Snowbrawl map.
These are things that give a team an advantage, and potentially more things worth fighting over on larger maps.