Use Petco Park for programming ... limit the number of people at the venue in general.
I like all of your suggestions, JT, but the two above are my favorites. I've called for Petco Park to be used for years and this can seemingly be implemented quicker than most of the other measures. Thousands upon thousands can be accommodated there. The big Hall H panels can move there, the suddenly bigger Ballroom 20 panels can move down to Hall H, and the congestion of the 1-6ABCD rooms can be alleviated by the extra space made available from freeing up 20. A simple solution without having to immediately construct anything permanent.