although higher tier maps are now bigger, ground troops are still cramped in middle of nowhere, as battle rating increases, amount and coverage of ground troops throughout the map should increase too.
why is this even an issue? well, attackers dont really have much of a stealthy/unexpected option for bombing ground troops because single aircraft can oversee all of them - this leads into some bomber/attacker aircraft being too fast for anybody in the team to catch and therefore unfun to play against
should maps be bigger, these aircraft could bomb and flee from aircraft faster than themself, making it possible to match them against opponents faster than themself, while still being playable.
however, at the same time, this might mean that fighters too, would spread out more, and these bombers would be just sitting ducks, so i invite you to propose solutions.