SPG's curved sight

At present, there are already 7 self-propelled guns from various countries and more curved firing vehicles in the game.
However, it is worth noting that currently, these curved shooting units do not have corresponding sights suitable for their large-angle drop shots. Due to terrain obstruction, most SPG`s are difficult to provide effective firepower support. Taking the Japanese Type 75 SPG, which currently has the smallest artillery diameter, as an example. When launching the M-107 VT-shell, the corresponding gun elevation angle at a range of 6 km does not exceed 25 °. This makes it difficult for such units to play their normal involvement role.
Hope that the game mechanics and sights can effectively utilize this type of unit, rather than forcing these units that lack vertical stability and enemy seeking ability to stand at the forefront of the fire line.