Theres nothing to change imo.
I dont see the point complaining about Loach or whatever fish. Whoever wanna win should do his best, and prepare himself as good as possible in order to make his kingdom victorious.
Till today, Nation War got used to very few people inside, and sometimes, reaching 150 points by 1 kingdom took us even 30 min. But today it took like 10 mins.
So incase we ll have good fights like today in the future, probably the only change that can be done is to raise the number of points that makes us win.
A 30 min Nation War but full pvp is enough for everyone I believe.