Both KDs get some building credits now, and I think it has worked out well.
My suggestion is that both KDs could get spec credits as well.
Currently, I believe it is 3x median province acres for the victor, you could give some lesser amount (1.5, 2?) per acre based on the median province for the losing KD.
More importantly, for the duration of the EoWCF, the winning KD can 'Train Elites with Credits'.