Arguments why I think this is a good idea:
- Mortars can be researched rather early and give players enourmous advantage (disbalance).
- Making it easy to destroy mortars does not solve the problem as you never put them in the front lines to be easily destroyed
- Making them less powerful does not fully solve the problem. This is because you may have as many mortars as you wish raising the power of them as whole. The more mortars enemy has, the more trucks you must use to defend your structures. Problem is that the number of trucks is limited (this might lead to my second proposal).
- It is not difficult to create that anti-weapon. I imagine it as some sort of tesla tower that simply decreses damage made by mortars in some area. Don't need much effects here.
Another additional proposal: I believe that the reason why there is a limited number of trucks available is purely technical. It would be great if it would be possible to increase maximum number of trucks available.

