Actually, given the huge shift toward network centric warfare and sensor integration, one must ask if there really is a need for the previous generation heavy armor platforms that are unsuitable for certain terrains and probably more maintenance heavy.
I actually think tanks should give up on the main gun and get a Shilka style AA gun instead. Fighting drones will be the primary job of tanks. A rapid fire aa gun can take out tanks too. So, maybe an aa style gun is more useful for a tank rather than a huge main gun.
We have that already, it's called a dedicated AA system
Honestly maybe the volume of fire makes up for HE power? Airburst could make up for loss in power maybe if they added it. I don't think the drop matters, what matters the most is that there's a tank shooting at you and it's going to do a similar job either way I'm sure.
Then make that primary maneuver vehicle. Give up on the assault gun variant which is useless these days. Any vehicle without rapid fire AA and associated radar is deadweight.
In general yes, though making larger shell for same solutions won't cost too much, works well in northern China and modern urban landscapes, and probably can be done just in case.
The reason why everyone abandoned battleships is because a capital ship getting within visual range of an enemy vessel is just realistic. On the other hand, there are always going to be a ton of targets on the battlefield that would need a big gun to take out. If you don't have a vehicle to do that, then you're going to either lose a bunch of infantry to deal with the target or they need to wait for artillery or air support to take it out.
If you have a strong drone force flying around, you will be spotting those targets and taking them out with artillery, air strike or with drones. You don't need a big gun to take them out.
