There seems to be an issue with the King/Queen's ability to issue a Veto. Currently, a veto will negate a vote as long as the Yes votes do not reach 2:1 (2/3rds) of the voting powertable at the end of the vote (Do have questions on this though). However, for a King/Queen to issue a veto, they must issue the veto at the time of their vote. Voting No or even Yes (I will provide an example for such), eliminates the King/Queen's power to issue a Veto.
A King/Queen's Veto should be a separate action from his/her Vote. A King/Queen should have the option to vote on the law or payout as they see fit. In comparison to reality (I know this is a game and shouldn't compare, but it is a worth example), a King/Queen would have no voting authority and would either approve or veto the the law or payout upon completion of the legislatures vote. Since this is a game, the King/Queen is given the option to vote. As with real life, a veto can be overturned with a 2/3 majority. This is accomplished in game by forcing the King/Queen to issue the veto option before the vote comes to an end. The veto option in itself is a fantastic feature, but needs to be adjusted.
My suggestion is basically giving a King/Queen the option to Veto at anytime as long as the vote has not expired.
Additionally, I think that the Veto should remain the same in requirements of 2:1 to overturn and it should base this value on the maximum voting power during the time of the vote. If the total voting power is 100 at the start of the vote and increases to 110 before the end of the Vote, the Yes votes must be 2/3 of 110 to overturn the Veto.
A few examples:
A King/Queen voting No is not affirmation of issuing a Veto as some King/Queen's allow the majority of the nation decide on issues, even though they may disagree. National issues can change on short notice and the ability to Veto should still be an option.
A King/Queen voting Yes is also not an negation of the use of Veto. The law change or payout may have the initial approval of the King/Queen, but national issues and concerns can change on short notice and the ability to Veto should still be an option.
Hopefully, I explained that thoroughly. I'm in a bit of a rush and want to get this out, so as not to forget.