I just tried several wars.
The arrows are always there. I did not see a single problem.
The fortifications deliver 0.5 points per destroyed fortification plus 0.01 or 0.02 due to damage and casualties.
When all fortifications are destroyed, the total damage points from fortifications is 50.
This was 50 before. nothing is changed.
War is as easy or as difficult as before because none of the war rules was changed, no changes in the relative power of weapons or ammunition no changes in the war engine and no changes what so ever in the painting.
If you think that the change in the counting of damage points from fortifications makes winning wars easier, read the game news again.
If you remain convinced that winning wars is easier, than before, that is OK too.