Aurora not only have half the hp of other tanks, but also tends to miss a lot and cant shoot much upwards-downwards. And needs scauting or radar to use its range. And huge amount of micro. Depends of the map, but on big open landmap, I think most players are unable to use Auroras effectively. New players even less.
Aeon also has worst t1 frigat and quite useless aa boat. T1 mobile aa on land has slightly more health and dps than tanks (not to mention t2...), but Shard (t1 aa boat), is so far from the same comparison with frigats.
Not so much of a problem, but Aeon t1 arty is the only one that can shoot only in front side. So you cant run around and shoot as easily as with other nations. Can be a problem for kiteing, to follow Auroras...
So getting over the beginning, t1 stage, of the game when playing with aeon can be quite difficult. I think this is what most people dont like. Aeon has best destroyer, useless t3 gunship, bad t2 fighter, no fighter bomber, etc. Those are factional differencis, you can compensate with other units. But t1 is hard to avoid.
I dont really see why people would not like to play against Aeon. Might be, that if someone actually chooses Aeon, it might mean that he knows what he is doing and has very good micro.?
I think no need for more screenshots?
There is also a very easy and not fun way to adress those problems that you pointed out.
Rise the hp and reduce the range of Aurora. Makeing it similar to other t1 tanks. Same range, and (more or less) same hp. Keep the hover to go over water and dodge, keep the fireing problems related to elevation and slow speed. It will still be faction specific unit.
Not sure if this is good idea, but it might make low-to-medium level players use it as they use other nations... Also almost no balancing to do, and easy to learn for players.
So 4v4 means 8 minutes of real time needs to pass for game to be ranked? Including pauses? Why not to have some game time necessaire too. In noob games no one really looks at real time and people take time to react, then they discuss about f11, then they discuss who is lagging, why is lagging, then they pause (or not) and try to fix it etc. game with only one minut of game time and no shots fired can be rated. I do not know the raisoning behind this rule, but it seems that those games should better not be rated. Maybe 8 minutes of real time and 4 minutes of game time? Or only 5 minutes of game time necessaire for game to be ranked?
Of course, those suggestions would often be wrong. But this should allow -200 player to play as 200 and learn in-game. This should avoid someone not having any power generator at 10 min. Or not upgrading any mexes. Or having one uncapped t3 mex and others t1. Or not reclaiming at all. etc. This should avoid a moment when player does a huge mistake over and over, that does not let him go forward in learning, and as he does not find this mistake, he quits. Also, for example if he sees that takeing mexes is good idea, next time he will do it already before notification, and so the notification will not pop up. Good player should be able to play with this (mod) basicly without any notifications coming up. So it should not give bad habits, because units and game mechanics are the same, and no real advantage over good players. It would only allow to avoid big mistakes, learn faster, learn playing, and not to be obliged to go through tonnes of learning materiel before being able to play a game.
Ctrl+click on "small guy" icon on scoreboard asks for engi already. The same with asking power and mass. Shift+click gives unit, or in case of power/mass, gives 25%.
Most of on screen messages I have seen are easy to understand/universel: ACU, nuke, antinuke, mavor, tml, eco, yellow ping for assist, blue for move and red for attack... People use multiple pings for more precision: Blue ping on unit (group) you want to be moved, followed by blue ping in place you want it to be moved to.
Official FAF language is english. I am not native english speaker, but as most players I respect to use of english ingame. Even when there are players from my nationality ingame, I speak english. As almost all other players (ecxept russians somtimes). And I dont use my langauage to make worst teams for other nationalitys. Or to bully them. Or to insult them.