Remove point drop in sieges from piloted field guns. The reason is simple, it is extremely easy to just unpilot the field gun to avoid dropping points anyway, so in practice they do not drop points. But now you have a highly inconvenient thing to worry about if you just piloted the gun to see further or you wanted to move it.
The point drop really adds nothing to the game except inconvenience. Was it really intended for us to basically metagame around /pilot and /release during the siege? that is an aspect of the game that I consider completely unintended, unreasonable and needless and should be removed. Cannons themselves are already very very weak when compared to heavy tanks and losing points to cannon destruction does not make sense be it piloted or not, else the best option will be to just defend with tanks making entire forts useless