Totally agree, that it is easy to micro a group of Auroras against enemy tank-group, when there are no othe units/buildings in the game. And even more, if enemy kills his units in most favorable way for you.
But if you move your units forward, enemy might push his units too, and if you do not react perfectly fast, he will get in range and crush (if small amount of units). And if you kite, enemy probably will pull back his units, even if second later might try to follow your units outside of range. And if you move forward... Micro continues. This is micro for both sides, but mistakes are much more expensive for Aeon. And so precision needs to be more important, and so it is harder than for other nations. Also other nations have t1 arty that can shoot in all directions while maneuvering.
Still, it is "so easy". But it starts to get less easy when you have a big open map, with many-many tank-groups, that all need "only little attention", all the time. While mouving back one group might mean that another one gets encircled or you lose a strategic position. While you need to scaut to not get cut off. While you need to pay for landscauts, and avoid them getting far in front. While you need to manage eco in large space and not only win air, but have active air control, to kill bombers before they drop bombs. etc.
The fact that low/mid rated players have other issues also, does not enter in consideration on this subject, as they have those problems with all nations. But the need to avoid enemy tanks and planes getting close all the time, in all places, they have this problem only with Aeon.
On t1 sniper level... If Aeon gets more or less equal t1 tank to other nations, I dont really see why one nation should have t1 sniper, while other nations do not.
But I have some difficulties to believe, that Aeon is less played/liked than other nations, only because it is too strong...