Yes, the Chiefs are basically throwing a lifeline to the Royals. Chiefs are uber popular. Royals are not and downtown stadium is a little controversial (not to me). On its own, Royals might lose the vote. But Chiefs are helping out by publishing their vision of how they might spend their share of the continued tax revenues. Personally, I would have guessed the Chiefs would have razed Kauffman Stadium and built a new Arrowhead, but maybe the price tag is too high (Hunt is unwilling to put in the extra $2.0+ billion).
But yes, nothing to do with the NFLPA scorecard. All that can be addressed at any time and probably for not much money.