I wonder if the next Smash should completely redesign how many ATs work. Currently, the more “sort of a playable character” ATs just do their thing completely autonomously, you can’t really interact with them besides being beaten up by them or attacking them, and there isn’t a whole lot of counterplay to it being a 2v1.
My idea is that many ATs would follow directly behind you and attack when you do certain things, sort of not quite like a much less featured second Ice Climber. Some would dish out follow-up hits when you land a hit on an enemy, some would fire supporting projectiles when you use a special, some would attack enemies while you hold shield, some would grant you buffs or healing. Some of them could assist your recovery by attacking when you do your up special, or carrying you through the air if you hold the jump button. If you’ve played any of the Rifts in Multiversus where Toasty assists you by firing projectiles at enemies you hit, these ATs are kinda like that but more fleshed out and powerful.
The idea here is that the AT would create a proper team-up between you and the character, and, by their moves being wholly tied to what you do, makes them far more interactive. Your opponent is also able to counter them simply by managing to attack you, since the ATs won’t help you while you’re in hitstun. (Also, just imagine the combo videos with these ATs.)