This is going to be as expected, its not worth the while bothering with.
There is the requirement to do things not normally done,and without a stronghold the clans already 1 category down.
A separate category for points in defending, means you have to let someone attack you, which means either on tiles or leaving the town exposed.
You mostly get attacked on tiles by much bigger players so the loss in manpower is significant, it will also mean that yielding will also be that much harder .
Of course this may be your plan.
However.
I believe its ill conceived,
Lets see how many more players quit.