Add one new building: Temple, which is only built in a village with WW, which casts a blessing on one player and gives a bonus in attack / defense depending on the level of the building once a day (other times are possible)
This will add a lot of strategies, there will be a real interest in kingdoms to have 2 WW, in one to build a temple (since the time for its construction should be reasonable), and then WW, and in the second WW. Or a small kingdom that does not claim to win will be able to give its buff to other kingdoms (if they have an alliance, for example)
The temple can also give a general bonus for the whole kingdom, but not as great if you give a buff to one player
And all kingdoms will give this bonus to a kingdom that is not in 1st place. So that someone doesn't win at any cost
Not the best kingdom in the game will win, but the kingdom with the best hands. Or it could be a weak kingdom.
As for me, you can eliminate WW and leave only VP. Then you will have to fight the entire server for a win, not deal with other kingdoms and take WWs from them at the end of the server, so that you have a % of WW.