Seriously why does empires need a heavy chassis? Either remove mediums and scale heavies down, or remove heavies and scale mediums up. As it stands, heavy tanks need to be extremely powerful to justify the resource cost, and when they are that powerful they always outclass mediums, and make light tanks totally obsolete. If you reduce the resource cost, you can reduce the power, but then it becomes 'why is it a heavy if it's only slightly better than the medium? Why do we need it?' If you had only two main battle tank chassis you could fix that. Make one light and fast and cheap, and one heavy and slow and more expensive, but not as heavy slow and expensive as a heavy. I mean thinking about it, if you removed heavies, teamwork becomes more neccesary, you can't drive a heavy into a base and blast a comm any more, and you can't go all uberheavy on people, battles become more spectacular because they have more vehicles on the field, and everybody can afford one because they're cheaper. Now I'm not against having more chassis, but I think they should be variants rather than universal upgrades, like for example you can get a medium with more gun slots at the expense of armor, or more armor at the expense of speed, or more speed at the expense of armor etc. You can also do the same for lights if you want, the variant system might be a more like RPG attributes than specific chassis, like you put more points into guns, armor, or speed when you build your tank to create the balance you want, you might eve be able to do it with the weight system. You could also add more weapons to the other tanks, like give the light a two slot cannon, and the med a three slot, and add more guns for each, so you can blur the line between light and medium. You might also include a different vehicle type altogether, such as a big beefy armored vehicle which the commander has to buy with most of the firepower being controlled by other players, like a leviathan without the big ion cannon. It could work like a superheavy except it requires lots of players to control it and so doesn't give any one player a lot of power, and scales better because the enemy team would have more meds to fight it with. Of course people who like driving superheavies and dominating everything will whine, but while they enjoy it, the people they kill do not. People who drive mediums and heavies which are on an even par with the enemy team shouldn't object as much because it will make all games more like that. People who like being able to pick their playstyle should be happier, because the variants would support that, people who are speed demons would be better with a fast tank, people who are not as good at control will be better with an armored up tank, and people who like to stay back and do damage will be better with a gunned up tank. Basically I just reckon that removing the heavy will make it more about team skill than 'person driving the heavy' skill, it will make the game easier to balance and scale, it means more people can play in vehicles (which is more fun) it makes infantry better in the late game, and it does not preclude the addition of new vehicle types as neccesary.