Auto(re)loaders are characterized by high burst damage, low DPM and long reload times. So you would presume that countering such a tank requires you to wait for them to spend the magazine and move in for the kill while they are helpless. You could also in theory, if nothing else was considered, trade them for damage and you would end up doing more damage over time. Yet in practice, it often doesn't work out that way.
Average casual players rarely have to opportunity or the skill to even get close to maximizing their DPM, so they don't often get caught in a situation where DPM matters all that much. Being able to burst damage seems not much different from just having high alpha. Having a magazine is particularly strong in groups, where individual enemy players can't easily push you once you need to reload. The only weakness that can't be easily circumvented is that they need to expose themselves for some time in order to effectively deliver that damage, but in theory they could always choose to sacrifice DPM to lower their overall risk. So you end up with a class of tank that is very capable of punishing mistakes, while also being somewhat capable of hiding its own weaknesses. That isn't to say that the mechanic is overpowered by any means, the weaknesses are there and they can be exploited.
But if there's one thing that I particularly dislike about autoloaders is that they are very difficult for a new player to deal with. A new player needs to know a lot of information to make an educated decision on what to do with such tanks. They need to know the magazine size and reload time to even begin countering them. But it becomes significantly more difficult knowing that there are not just autoloaders but autoreloaders that are distinctly different. Not only that, but with the new Italian heavies, you need to take into account their ability to shorten the downtime even more. While I don't consider it a huge issue, I can understand the sentiment of the OP that the number of autoloaders shouldn't become too dominant.
Edited by Ghoststalker, 22 November 2020 - 07:42 PM.